GSM printed circuit board KN520

multilayercustom-madeprepreg PCB

The GSM PCB board KN520 is the most advanced fixed wireless telephone mainboard. GSM 2G/3G /4G solar powered with built-in rechargeable battery optional The GSM PCB board is manufactured by KNTECH, the largest industrial telephone manufacturing expert in Asia. GSM PCB board KN520 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 3w/8Ω digital amplifier, drive loudspeakers directly, brings the absolute guarantee for the call quality. GSM PCB board KN520 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).