Specification :

Detail: Frequency: 433.92MHZ
Sound: 75DB
Rmote controller: 8.5X3X1CM
WT: 38.5g ( battery included)
Battery: CR2032 1pc 3v
Receiver: 4.5X2.8X1.1CM
WT: 13.5g( battery included)
Battery: CR2032 1pc 3V
Color box package
Working distance: 25-40meters.

Stick the remote controller on the wall, and the receiver with keys or the article you always can' t find, when you can' t find them, just push the corresponding button on the remote controller, and the receiver will sound alarm right away.( it can find the lost thing in a 400 square meter house)
The alarm will last for 4 seconds then stopped automatically.
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