Product categories:Electronic Whistle Brand: JUNCTION Model: T9 Color: red, yellow, green, blue, black Size: about 12.1*3.3*2cm Net weight: about 100g Power supply: Use 3 AAA batteries (batteries not delivered) Uses: sports competitions (outdoors, sports events), emergency rescue (lifeguards), public places to organize gatherings warning command, traffic command, pet training, outdoor help, etc. Pronunciation key: When pressed, the whistle will sound, and when released, it will stop sounding Audio gear: three different sounds, you can toggle the gear to switch Volume level: high, medium and low volume, toggle the level key to switch the volume Tip: The maximum decibel of this product is 120dB+-5 decibel. When it is adjusted to the highest decibel, it is very easy to damage hearing at close range. Please use it correctly. Do not allow children to play. Please choose the appropriate volume according to the place of use Packing list: Electronic Whistle*1, Storage bag*1,Hanging rope*1,screwdriver*1, English manual*1(on box) Note:Light and different displays may cause the color of the item in the picture a little different from the real thing. Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement. Sold by-Minnanxin