[Hand Whistle & No Touch Mouth Whistle] Compared with traditional whistle,Electronic whistle can avoid mouth contact. Just press the sound button then it will bring a loud and clear sound. which saves effort and prevents spatter of saliva between users. Whistle with lanyard perfect for referee coaches, P.E. teacher, marine, outdoor camping, sports competitions, traffic guides, pet training, self Defense Emergency. It has led lighting function, which can assist in lighting in dark environments. Easy to use. It has a comfortable ergonomic design with one-handed operation, and a detachable lanyard for convenience. [Easy to Carry] equipped with a long lanyard, it can easily loop through backpack, sailboats, camping hiking gear, life jacket, kayak. You can also tie the whistle to your neck, shoulder straps, belt and backpack or put it on the pocket for quick and easy use in case of emergency. Colour:Red Material:Plastic Package Contents: 1 x Electronic Whistle(without charging head) 1 x usb cable(Color and style are random, don't accept the specified) 1 x Lanyard(Color and style are random, don't accept the specified) Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.