Specification :

Detail: Frequency: 433.92MHZ
Sound: 75DB
Transmitter: 8X5.2X0.56CM
WT: 21g ( battery included)
Battery: Lithium CR20162
Receiver: 4.5X2.8X1.1CM
WT: 13.5g( battery included)
Battery: CR2032X1

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: 25-40meters.
Model Number:
Brand Name:
Payment Terms:
Minimum:
Certification:
Delivery Time:
Supply Ablity: