4.3 in tft lcd screen. wide viewing angle 170°. pehole with built-in bell. save photos and videos in internal memory. option to add external memory with micro sd card up to 32 gb. it has a pir sensor to detect motion. it has 2 infrared leds for night vision. works with rechargeable lithium battery. the screen can turn off automatically after a few seconds. suitable for doors from 35 to 120mm thick. suitable for door hole from ø15 to 28mm. works with usb rechargeable battery. easy installation. black and silver finishes
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