1. 3 Digital display from 0-999 & A01 - F01-99

2. Work with 255  pcs wireless call buttons.

3. Cycling Max 29 calls

4. Receiving Distance: 400m in open area.

5. Indicate the service type.

6. 433MHz or 315MHz(Optional).    

7. Volume level adjusted

8. Ding Tong with English speaking for nos. & Dong Dong sound music.

9. Support E01A,E02A,E03A(For hospital & restaurants  w/ cancel call)