1. Beautiful and convenient design of knob.
2. Three level management (master card, management card, guest card).
3. Anti-prize keyhole design, safe and practical.
4. "Can not pull out key without lock" mode.
5. Battery low alarm mode.
6. Main board are stable and of high quality with industrial class chip.
7. The key is made by enclosure the IB chip into plastic, anti-shock, water proof, anti-cauterization, there is hole on both side, easy for carry.
Applications:Sports/Golf club, Spa and Public bath, Gym, Bowling center, Swimming pool, Roller and Ice rink, Airport, Mail box and so on where use-friendly require Locker room functions.