Net Weight: 62g

There are two styles of this key finder set, as shown in the picture, and which will be randomly sent.
External material: plastic
Design: RF Wireless Technology/Environmental/stable function/No-Radiation
Transmitter&receiver powered by button cell batteries (included)
This is One Transmitter Controller and four Wireless Receiver Super Electronic Key Finder Anti-Lost Alarm Keychain.
The receiver is very small and light, very easy to secure to the keys.
Credit card size transmitter easily fits in your wallet or purse
Top quality finder, won't break on you or give you any false alarms
Find keys just by a simple press
Size: Receiver: 4.5 x 2.8 x 1.1cm (Powered by CR2032x1 battery)
Transmitter: 8 x 5.1 x 0.4cm (Powered by CR2016x2 battery)
Long RF wireless control distance up to 30 meters (90 feet) away, through floors, walls, even sofa cushions
With One Controller and four Wireless Receiver to find 4 things
Keep the Receiver to with the thing that you want to find.
Note: Color and pattern sent by random.
How to use:
Match: Turn up the Keychain switch to "ON" position, it will beep constantly ("dee...dee.."),and push the button on the card, keychain will stop beep after matching.
Find: When you want to find the lost keys, just push the button on the card, and the keychain will sound alarm within 1 second, alarm will last for 4 seconds and then stop.