The wallet has built-in 400 mhz radio receiver and transmits induction signal to earpiece.
- Wallet receiver powered by 5pcs of AAA battery.
- 1 wallet RX has 2 frequency points: 446.055/ 446.180MHz or 446.305/ 446.430MHz.
- 1 walkie talkie TX (buy it from your local shop) can serve many wallet RX.
- Distance between wallet induction module and micro earpiece isn't over 80cm.