... with 2wired output which uses the SMS to control the wired output this SN2301GSM/PSTN alarm system ... the SN2301GSM/PSTN alarm system with 2wired output can control the output by SMS. for example : use ... . When using our pir, ceiling mount pir, directional pir and vibration sensor, these sensors can display ... Ic, the time keeps right after power off16. Remote control, listen in, speak, arm, disarm, or turn ...