K2 Safety K-Signal Electronic Whistle (Black) – Rechargeable USB Emergency Safety Whistle with LED Light, Loud Alarm & Morse Code Alert for Outdoor, Industrial, and Worksite Use
There are 79 item(s) in your cart
Product Description
K2 Safety Electronic Whistle K-Signal (Black)
The K2 Safety K-Signal is a next-generation electronic whistle designed for safety in extreme environments such as fine dust, yellow dust, or other harsh weather conditions. Instead of blowing a traditional whistle, the K-Signal uses an adjustable resonance chamber to amplify frequency, producing a powerful and penetrating sound that ensures it can be heard clearly in noisy or emergency situations.
Its slim, handheld design makes it easy to carry anywhere, while the built-in USB rechargeable battery allows convenient charging from PCs, laptops, wall outlets, or car USB ports.
The K-Signal also integrates a Morse-code-based emergency alarm system for quick distress signaling, as well as a high-intensity LED lamp, providing added visibility and safety in dark or hazardous worksites.
- - All-Weather Alternative to Traditional Whistles – Works in fine dust, sandstorms, and harsh environments.
- - Adjustable Resonance Chamber – Produces a strong and penetrating sound.
- - Compact & Portable – Slim design fits easily in the hand.
- - USB Rechargeable – Compatible with PC, laptop, wall outlet, and car USB ports.
- - Emergency Alert System – Morse principle for quick emergency signaling.
- - High-Brightness LED Lamp – Ensures safe use in dark environments.

Global Shipping
ROAExpo provides Global Shipping to over 130+ Countries worldwide.
All orders are shipped from our Central Logistics Hub, currently operated in South Korea, where ROAExpo directly performs free pre-shipment QQ Inspection (Quality & Quantity Inspection). Additional regional logistics hubs will be expanded globally in the future.
Available Shipping Methods
- Sea Parcel – Most economical option for heavy or bulk orders
- Air Parcel – Balanced option between cost and delivery speed
- EMS – International postal delivery service
- FedEx – Fast express courier service
- UPS – Premium international courier service
Shipping availability and transit time may vary depending on destination country and local regulations.
Shipping Cost Calculation
- Destination Country
- Total Shipment Weight
- Selected Shipping Method
Products from different brands or stores can be combined into one shipment when shipped from the same origin country.
You can combine products from multiple brands or stores in one cart to reach the USD $150 purchase threshold and receive shipping discounts, as long as the products are shipped from the same origin country.
The Final Shipping Cost Before Payment is clearly displayed at checkout. There are No Hidden Fees after payment confirmation.
Shipping Discount Benefits – Global Free Shipping (GFS)
- Orders over USD $150 with total shipping weight under 3kg may qualify for Free Shipping
- If total shipping weight exceeds 3kg, customers may receive up to USD $30 Shipping Discount
- The GFS Coupon (Code: ENJOYGFS-KOR) is automatically issued to eligible members and can be found in the member’s account after login. There is no limit on the number of uses.
- The GFS coupon may be combined with other promotions or coupons
- Eligibility may vary depending on product category, shipping method, and stock availability
Final discounted shipping cost is shown before payment confirmation.
Seasonal shipping promotions are announced on our homepage banners and member emails.
Order Processing & Tracking
All orders undergo free pre-shipment QQ Inspection directly performed by ROAExpo before shipment.
Once shipped, a Tracking Number will be provided to the customer.
Delivery time may vary due to customs clearance, local carrier operations, weather conditions, or public holidays.
Customs & Import Duties
Import duties, taxes, and customs fees may be charged by the destination country and are the responsibility of the customer unless otherwise stated.
Customer Support
???? cs@roaexpo.com
☎️ +82-2-6951-0318 (Available Monday–Friday, 10:00–17:00 KST)
Authentic Products Guarantee
All products sold on ROAExpo are Authentic Products sourced directly from Official Suppliers or manufacturers.
Returns Due to Defect or Shipping Error
If a product arrives damaged, defective, or incorrect, please contact Customer Support within 7 days of delivery and provide photos or videos as evidence.
ROAExpo will review the case and provide appropriate resolution, including replacement or refund when applicable.
Returns for Change of Mind
Due to international shipping and customs regulations, returns for personal reasons may be restricted.
In such cases, the customer may be responsible for all return shipping costs and any applicable customs charges.
Please contact Customer Support before initiating any return shipment.
Refund Processing
Refunds are processed after the returned item is received and inspected, or after the claim is verified.
Refund processing time may vary depending on payment method and financial institutions.
Non-Returnable Items
Certain products may not be eligible for return due to hygiene, safety, or manufacturer restrictions.
Customer Support
???? cs@roaexpo.com
☎️ +82-2-6951-0318 (Available Monday–Friday, 10:00–17:00 KST)




![[Skindom] Volcanic Cluster Foaming Cleanser 500ml-Moisturizing the skin, removing impurities, absorbing sebum, exfoliating, soothing the skin-Made in Korea [Skindom] Volcanic Cluster Foaming Cleanser 500ml-Moisturizing the skin, removing impurities, absorbing sebum, exfoliating, soothing the skin-Made in Korea](https://d3d3ajccnahae5.cloudfront.net/fit-in/70x70/image/catalog/Seller_317/167_skd/download-20231123043925-1700714366.jpg)

![[HAEMO] Bonitto (Orange) Spoon & Chopsticks _ Reusable Stainless Steel Korean Chopsticks Spoon Tableware Home, Kitchen or Restaurant [HAEMO] Bonitto (Orange) Spoon & Chopsticks _ Reusable Stainless Steel Korean Chopsticks Spoon Tableware Home, Kitchen or Restaurant](https://d3d3ajccnahae5.cloudfront.net/fit-in/70x70/image/catalog/Seller_509/product/spoon/SC118/118-20210621084642.jpg)
![[PEACE] Heavy-Duty Staple Pins H-13 (8mm) | 1,000 pcs | High Carbon Steel | Sharp Chisel Point | Made in Korea [PEACE] Heavy-Duty Staple Pins H-13 (8mm) | 1,000 pcs | High Carbon Steel | Sharp Chisel Point | Made in Korea](https://d3d3ajccnahae5.cloudfront.net/fit-in/70x70/image/catalog/Seller_7971/Products/Staples/Satpler33/Peace_Stapler_H-13_8_01-20251219065028-1766127028.jpg)


![[S2B] Kakao Friends Happy Together Galaxy Z Flip 4 Transparent Reinforced Case_ TPU Material, Authenticated Product, Transparent PC Material_ Made in KOREA [S2B] Kakao Friends Happy Together Galaxy Z Flip 4 Transparent Reinforced Case_ TPU Material, Authenticated Product, Transparent PC Material_ Made in KOREA](https://d3d3ajccnahae5.cloudfront.net/fit-in/70x70/image/catalog/Seller_494/product/STB-01/S2B-39/Galaxy Z Flip 4 Transparent Reinforced Case_01-20220816035445.jpg)

![[HWASHIN] Lopping Shears K-630, 770mm, Thick Branches, Carbon Tool Steel SK-5, Teflon coating, Lever Principle, Shock Mitigation, Plastic Injection Handle - Made In Korea [HWASHIN] Lopping Shears K-630, 770mm, Thick Branches, Carbon Tool Steel SK-5, Teflon coating, Lever Principle, Shock Mitigation, Plastic Injection Handle - Made In Korea](https://d3d3ajccnahae5.cloudfront.net/fit-in/70x70/image/catalog/Seller_6309/2 handed scissors/K-630/Hwashin_ K-630_1-20240418031943-1713410385.png)
![[ILYANG Pharmaceutical] Memory Blood Flow Blood Sugar All-in-One Healthcare Ginkgo Biloba Banaba 60 Tablets _ Made in Korea [ILYANG Pharmaceutical] Memory Blood Flow Blood Sugar All-in-One Healthcare Ginkgo Biloba Banaba 60 Tablets _ Made in Korea](https://d3d3ajccnahae5.cloudfront.net/fit-in/70x70/image/catalog/Seller_6595/Products_1/ILYANG _ 39/jdc-iy01-m-20260623043721-1782189443.jpg)





![[Cielcoco] CLWT8077 Boat Neck Shirring Cover Up_Beige, Boatneck Top, Short-sleeved T-shirt, summer shirt, sportswear, indoor wear, women's fashion _ Made in KOREA [Cielcoco] CLWT8077 Boat Neck Shirring Cover Up_Beige, Boatneck Top, Short-sleeved T-shirt, summer shirt, sportswear, indoor wear, women's fashion _ Made in KOREA](https://d3d3ajccnahae5.cloudfront.net/fit-in/70x70/image/catalog/Seller_546/Products/tops/coverup/CLWT8077/CLWT8077_beige-20210730090730.jpg)

![[ARTSAM] DIY White Christmas Landscape Suncatcher Kit – Easy-to-Make Art & Craft Supplies for Unique Creations [ARTSAM] DIY White Christmas Landscape Suncatcher Kit – Easy-to-Make Art & Craft Supplies for Unique Creations](https://d3d3ajccnahae5.cloudfront.net/fit-in/70x70/image/catalog/Seller_7031/product/Winter/Suncatcher/Suncatcher 01-20250317015616-1742176576.jpg)


![[Hasung] Home Hair Clipper Set, For Kids, Self Home haircut, Ceramic Blade _ Made in KOREA [Hasung] Home Hair Clipper Set, For Kids, Self Home haircut, Ceramic Blade _ Made in KOREA](https://d3d3ajccnahae5.cloudfront.net/fit-in/70x70/image/catalog/Seller_330/product/1.haircut/12. hair cut set/THU1-20210309074713.jpg)
![[GOOD FARMER] Witch’s Pepper Tea 1.5g x 20T – A Spell for a Lighter, Healthier You! Specially Blended Tea with Smooth Flavor and Health Benefits, Made in Korea [GOOD FARMER] Witch’s Pepper Tea 1.5g x 20T – A Spell for a Lighter, Healthier You! Specially Blended Tea with Smooth Flavor and Health Benefits, Made in Korea](https://d3d3ajccnahae5.cloudfront.net/fit-in/70x70/image/catalog/Seller_6802/Products/GOODFARMER_04/hdp-m11-20241202091250-1733130772.jpg)


![[Paul Medison] Deep-red Perfume Hair Cream _ 80ml/ 2.7Fl.oz, No Wash Hair Pack for Damaged Hair _ Made in Korea [Paul Medison] Deep-red Perfume Hair Cream _ 80ml/ 2.7Fl.oz, No Wash Hair Pack for Damaged Hair _ Made in Korea](https://d3d3ajccnahae5.cloudfront.net/fit-in/70x70/image/catalog/Seller_1883/Product/Paul Medison_ Deep-red Perfume Hair Cream/download-20241025010028-1729818028.jpg)

![[Insan Bamboo Salt] Insanga Roasted Garlic Herbal Pill 20g _ With 9x Roasted Bamboo Salt, Elm Bark & Barley Malt _ Made in Korea [Insan Bamboo Salt] Insanga Roasted Garlic Herbal Pill 20g _ With 9x Roasted Bamboo Salt, Elm Bark & Barley Malt _ Made in Korea](https://d3d3ajccnahae5.cloudfront.net/fit-in/70x70/image/catalog/Seller_6391/Products_1/INSAN_58/1-20250805053532-1754372132.jpg)




![[PERFECTION] Flower, Infant Teething Toy _ Baby Teething tots, Silicone Teething tots, Easy to Hold, FDA-approved, Newborn, Soft _ Made in KOREA [PERFECTION] Flower, Infant Teething Toy _ Baby Teething tots, Silicone Teething tots, Easy to Hold, FDA-approved, Newborn, Soft _ Made in KOREA](https://d3d3ajccnahae5.cloudfront.net/fit-in/70x70/image/catalog/Seller_366/product/05_teething/fruit/flower_B-20210409004408.jpg)
![[HAEMO] Bonitto Matte _ Sky Blue, Spoon & Chopsticks, 1 Set _ Reusable Stainless Steel, Korean Chopsticks Spoon _ Made in KOREA [HAEMO] Bonitto Matte _ Sky Blue, Spoon & Chopsticks, 1 Set _ Reusable Stainless Steel, Korean Chopsticks Spoon _ Made in KOREA](https://d3d3ajccnahae5.cloudfront.net/fit-in/70x70/image/catalog/Seller_509/product/spoon/SS092/092-20210629071857.jpg)


![[S2B] Disney Princess Mini AirPods 3 Slim Case_Slim Case, Key Ring Case, Wireless Chargeable, Grip_Made in Korea [S2B] Disney Princess Mini AirPods 3 Slim Case_Slim Case, Key Ring Case, Wireless Chargeable, Grip_Made in Korea](https://d3d3ajccnahae5.cloudfront.net/fit-in/70x70/image/catalog/Seller_494/product/DISNEY/ DISNEY_MPA3/20211125_104504_682-20211126082605.jpg)
![[INSAN BAMBOO SALT] Insan Roasted Purple Bamboo Salt (Powder) 1kg _ Mineral-Rich Antioxidant Salt _ Made in Korea [INSAN BAMBOO SALT] Insan Roasted Purple Bamboo Salt (Powder) 1kg _ Mineral-Rich Antioxidant Salt _ Made in Korea](https://d3d3ajccnahae5.cloudfront.net/fit-in/70x70/image/catalog/Seller_6391/Products_1/INSAN_12/1-20250729091924-1753780764.jpg)
![[Skindom] Collagen Cream (250ml) - Elasticity, All Skin, Nourishing Cream, For Skincare shop _ Made in KOREA [Skindom] Collagen Cream (250ml) - Elasticity, All Skin, Nourishing Cream, For Skincare shop _ Made in KOREA](https://d3d3ajccnahae5.cloudfront.net/fit-in/70x70/image/catalog/Seller_317/product/Cream/colla_c_th250-20210311101530.jpg)





![[CELLBYCELL] Modeling Ice 1000g - Instant Cooling Effect for Soothing and Hydrating Your Skin! Made in Korea [CELLBYCELL] Modeling Ice 1000g - Instant Cooling Effect for Soothing and Hydrating Your Skin! Made in Korea](https://d3d3ajccnahae5.cloudfront.net/fit-in/70x70/image/catalog/Seller_6586/PRODUCTS_1/CELL14/66f68faa042d1eb851b8a03022e44424-20241010084044-1728549646.jpg)
![[ILYANG Pharmaceutical] Saw Palmetto Octacosanol Premium Men Prostate Health Endurance Booster 60 Capsules 2 Month Supply _ Made in Korea [ILYANG Pharmaceutical] Saw Palmetto Octacosanol Premium Men Prostate Health Endurance Booster 60 Capsules 2 Month Supply _ Made in Korea](https://d3d3ajccnahae5.cloudfront.net/fit-in/70x70/image/catalog/Seller_6595/Products_1/ILYANG _ 29/bizline-0515-m21-20260619052120-1781846482.jpg)


![[Paul Medison] Kids Baby Stain Out Laundry Soap _ 210g/ 7.4oz, 3 bars, Baking soda, Stain Removal, Harmful Ingredients-Free, Baby Clothes [Paul Medison] Kids Baby Stain Out Laundry Soap _ 210g/ 7.4oz, 3 bars, Baking soda, Stain Removal, Harmful Ingredients-Free, Baby Clothes](https://d3d3ajccnahae5.cloudfront.net/fit-in/70x70/image/catalog/Seller_1883/Product/Paul Medison_ Kids Baby Stain Out Laundry Soap/download-20241031015630-1730339790.jpg)
![[M.v.Eisenberg] Vergnugen 3-Ply Frying Pan | 24cm 28cm 28cmWok | Honeycomb Base for Even Oil Distribution | Low-Heat Handle | Stainless Steel & Aluminum [M.v.Eisenberg] Vergnugen 3-Ply Frying Pan | 24cm 28cm 28cmWok | Honeycomb Base for Even Oil Distribution | Low-Heat Handle | Stainless Steel & Aluminum](https://d3d3ajccnahae5.cloudfront.net/fit-in/70x70/image/catalog/Seller_7053/Product/3Ply Frying Pan/3-Ply Frying Pan 01-20250325002537-1742862337.jpg)

![[ARTSAM] DIY Christmas Folding Card Kit – Easy-to-Make Art & Craft Supplies for Unique Creations [ARTSAM] DIY Christmas Folding Card Kit – Easy-to-Make Art & Craft Supplies for Unique Creations](https://d3d3ajccnahae5.cloudfront.net/fit-in/70x70/image/catalog/Seller_7031/product/Winter/Card/Folding Card 01-20250319005505-1742345705.jpg)





