✮ 【LED display】: Equipped with a display to show information such as signals, standby status, operating status, etc. With a reverse polarity signal, you can access the meter or use a computer meter.

✮ 【Easy to Install】: no need to invest in a ground wire, use a GSM cell phone SIM card. Does not change the original dialing habits, the same as the operating habits of ordinary landline phones. Support international and national, local, fixed/mobile voice services.

✮ 【Automatic detection】: Built-in monitoring circuit, automatic detection of equipment operating status, automatic restart failure. Adopt anti-noise, anti-noise and anti-interference circuit design. Standard communication voltage, can be connected with user switch (PABX).

✮ 【Automatic IP function】: Multiple IP settings. International phone, domestic phone, local phone and other types of access parameters. Fixed long distance automatically inserts the call IP prefix, such as 17951,17911,193, etc. With reverse polarity signal, can be connected to a meter or use a computer meter.

✮ 【Encryption Settings】: Such as PIN code, PUK code encryption card lock function. Preset local numbers, local network segments, and prohibited dialing numbers or network segments. If you have any questions, please feel free to contact us for a refund or replacement.