This wallet built in 400 mhz walkie talkie radio receiver and transmit induction signal to earpiece.
- Wallet receiver powered by 5pcs of AAA battery.
- There are two optional frequency points: 446.305/ 446.430MHz or 446.055/ 446.180MHz
- There is a button to switch the frequecny point.
- 1 walkie talkie serves many this wallet receivers.
- Distance between walkie talkie and wallet receiver should NOT over 1000 meters.
- Distance between wallet and spy earpiece should NOT over 80cm.