- Adopt GSM / 2G net communication, without any distance limitation, it can be used anywhere.
- 850/900/1800/1900MHz quad-band GSM frequency, can work in global GSM network.
- Without call charges, the GSM GPRS relay switch rejects calls from authorized numbers and then performs an open / close operation on the first .
- Wide working voltage, support DC 9 – 24V power supply, and with anti-reverse protection design.
- Using SMS to set parameters remotely, easy to operate and easy to use.
