... English/Spanish/Chinese/Russian voice reminder 2 wired zones, 12 wireless zones3 Relay out to control your home appliances, DVR,etc ... for you optionWireless frequency 315/433MHZIt can work with wired & wireless PIR, door/window sensor, smoke/gas detector, glass break sensor ... alarming. It will send SMS to 3 mobile phones and auto-dial 3 phones to inform the usersYou can listen what is ...