This is cheap variation for smart doorbell you can use this wireless doorbell
camera, when someone presses the call button on the outdoor unit, the indoor
unit will ring and the mobile phone will get a notification, open the APP and
you can see aseries of photo of the person who is outside. Functions: ? Motion-
and ring-triggered smart phone notifications with recorded images. ? See
visitors? photo via mobile phone from any place. ? Free Cloud storage, view the
photos for 3*24 hours for free. ? Work as a normal door chime when smart phone
is not nearby or turned off. ? Night vision camera, resolution is 640 x 480. ?
Motion detection sensitivity adjustable, motion detection Range is 3m and 70°. ?
Camera viewing angle is around 70°. ? Powered by 3xLR6 batteries (not included)
for easy installation. ? Bluetooth network configuration. ? Waterproof: IPX4.
DOORBELL TECHNICAL DATA ? Battery: DC 4.5V AA/LR6 x 3 ? Wireless distance: ? 80m
(open area) ? PIR angle: 70° ? Camera viewing angle: 70° ? Camera pixels: 350
000 ? Waterproof rating: IP45 ? Operation temperature: from -20 to 50°C ?
Operation humidity: 10 - 90% ? Dimensions outdoor unit (LxWxH): 51 x 20 x 126 mm
CHIME TECHNICAL DATA ? Battery: DC 4.5V AA/LR6 x 3 ? Wireless distance: ? 80m
(open area) ? Standby average current: < 200uA ? Operating average current:
< 100mA ? Volume: Low 60-70dB / Medium 70-80dB / High 80-90dB ? Operation
temperature: from -10 to 50°C ? Dimensions indoor unit (LxWxH):78 x 30 x 78 mm