radio visual intercom doorbell waterproof door chime,720p camera video phone wireless ip wifi door bell night vision

1.low power consumption,8 months' endurence 2.acurate motion detection by pir sensor 3.day/night,2-way audio communication 4.answer the door remotely by smart phone 5.imediate notification push to app(within 1sec) 6.power: 2*18650 battery or hardwire (ac8v-24v)(battery is not included in packing).syi