?Overview:Do you often lose your phone or keys as for your bad memory? Now 03A anti-lost alarm set is highly recommended to you. Just install the receiver on the gadgets those you often lose， and you can find them quickly by transmitter when you lost them. With the anti-lost alarm， your life will be more convenient.Brand: N/AModel: 03AQuantity: 1PieceColor: Black + whiteBattery: CR2032 (Included)It can be used in the living room， office， study， bedroom， etc.Features:1. It uses imported chip， strong anti-jamming performance， high quality and stable.2. Comes with three receivers those can be hung on keys or bags， durable and practical.3. Alarm sound is 40dB and effective distance can up to 20~30m.4. Working distance: 25~30m (outdoor)， 15~20m (indoor)， can look for gadgets throughout walls.5. Work frequency: 433.92MHz6. Battery life: One yearPacking list:1 x Transmitter3 x Receivers4 x CR2032 Batteries1 x English user manual<img src="http://112.74.112.28/down/products/446027/446027_000.jpg" noproxy>