Whistle Response Key Finder

100% brand new and high qualityQuantity:1pcs (key not include)Color: WhiteMaterial: plasticSize: 8cm/3.12"How to use it:1. Attach this electronic key finder to your keys.2. The sound reaches a certain decibels when whistling or speaking, then sounds and to help you to find your keys, with flashlight function.3. After a few minutes, when there is no any noise, it will stop sounds and flashes itself.