The GSM PCB board is manufactured by SUNWISE, the largest industrial telephone manufacturing expert in Asia. GSM PCB board SW520 supports arbitrary switching of 3g/4g at present.
In terms of electricity consumption, it not only supports internal storage battery, but also supports external solar motherboard. In conversation, built-in 3 w / 8 Ω digital amplifier, drive loudspeakers directly, brings the absolute guarantee for the call quality.
GSM PCB board SW520
PCB Features:
1. Support 3 G or 4 G, (optional).
2. Power supply: AC 110v/220v power or built-in rechargeable battery with solar powered panel optional.
3. Multiple key options: support dial any telephone number, the numeric keypad and function keys,speed dial keys, spspeed dial keys,4 button programmable telephone.
4.Voice interface: hands-free, handset, audio interfaces and an external amplifier interface.
5.Alarm Interface: Built-in three-way input and output control, options.
6.On board Amplifier: Built-in 3W / 8Ω digital amplifier, drive loudspeakers directly.
7.built-in Noise canceling microphone.
8.Waterproof grade about IP55.
9. Warning lights drive: support indicator lights for coming calls.
10. Support for automatic hanging up.
11. Send short message: send alarm short message(optional)
12. 2-way input or output control, (options).
13. 2-way dry contact output (options).
14. Optional 7 minute time-limited call.( This function upon buyer’s requirement).
15. Application: Tunnel, metro, railway, LRT, speedway, marine, ship,offshore, mine, power plant, bridge etc.
