1. Self-recording of on-site comforting voice

2. One-button automatic intercom call

3. Digital communication intercom call

4. Strong anti-interference and lightning protection performance

5. Engineering wiring is simple, reliable and safe

6. Frequency, software, digital and coding quadruple encryption technology, bid farewell to the problem of wireless interference

7.DPMR digital transmission mode is more clear, stable and reliable than traditional FM simulation

8.DPMR digital transmission technology has been listed in the national development plan because of its unique transmission mode.