Xiaomi Smart Doorbell 3S

Audio system: 2-way
Product colour: Black
International Protection (IP) code: IP65
Power source type: Battery, DC
AC input frequency: 50/60 Hz
Input voltage: 5 V
Battery type: Built-in battery
Battery life: 36 month(s)
Battery capacity: 5200 mAh
Rechargeable battery: Yes
Storage temperature (T-T): 0 - 45 °C
Operating temperature (T-T): -20 - 50 °C
Operating relative humidity (H-H): 10 - 90%
Bell height: 3.96 cm
Bell width: 6 cm
Depth: 29 mm
Width: 52 mm
Bell depth: 6 cm
Height: 146 mm
Connectivity technology: Wired & Wireless
Wi-Fi standards: 802.11g, Wi-Fi 4 (802.11n), 802.11b
Frequency: 2400 MHz
Wi-Fi: Yes
Built-in camera: Yes
Night vision: Yes
Warnings: Do not disassemble the appliance to avoid the risk of electric shock., Do not install or use the unit in damp or wet areas., Protect the appliance from direct sunlight and high temperatures.