electronic 4 in 1 alarm Wireless Remote TRACKER Key Finder lost things locator 4 receiver anti lost sensor alarm phone finder
WT: 21g (battery included)
Battery: Lithium CR2016*2
WT: 13.5g, battery included?
Battery: CR2032X1 (NOT INCLUED)
Put the card in the wallet, on the desk or stick it on the fridge. and the receiver with keys, when you can't find the keys, just push a button on the card, and the receiver will sound alarm within 1 second.
The alarm will last for 5 seconds then stopped.
Working distance: 25 meters.