... :25meter Description of Wallet finder: Wallet finder (Transmitter and Receiver Kit) with Beep Alarm and Light -the new, high tech ... finder. Advantage of wallet finder Lightweight, yet durable keychain receiver Credit card size transmitter fits in every wallet, purse, ... standard use7.Transmitter battery: 2 pieces CR2016 (included)8.Receiver battery: 2 pieces CR2032 (included)Product Notes for how ...