... English/Spanish/Chinese/Russian voice reminder 2 wired zones, 12 wireless zones3 Relay out to control your home appliances, DVR, ... remind usersGSM 900/1800MHZ,850/1900MHZ for you optionWireless frequency 315/433MHZIt can work with wired & wireless PIR, door/window sensor, ... smoke/gas detector, glass break sensor etc. Each wireless zone can match many wireless sensors. You can pre-record your voice in ...