Selling point: Wireless Auto-dial Alarm System; Emergency alarm functionR2 is an indoor siren, which will alarm immediately once triggeredR3 is a magnetic transmitterR5 is an infrared sensorR6 is a remote control, which can wirelessly turn on/off the main unitDial telephone or cell phone automatically when receiving alarm signalsAlarm in emergencyWireless monitoring functionVoice recording functionAll settings and recorded messages will not be lost when power failure occursDial the saved 6 groups of phone number in arming mode once triggered.GSM card function allows putting main unit everywhere that hasn’t telephone line.Up to 38 accessories (such as remote control and transitter)can be used in the system .WirelessAccessory: 1 switch power