Xiaomi Smart Doorbell 3S

International Protection (IP) code: IP65
Audio system: 2-way
Product colour: Black
Battery type: Built-in battery
Rechargeable battery: Yes
Battery capacity: 5200 mAh
Battery life: 36 month(s)
AC input frequency: 50/60 Hz
Power source type: Battery, DC
Input voltage: 5 V
Operating temperature (T-T): -20 - 50 °C
Storage temperature (T-T): 0 - 45 °C
Operating relative humidity (H-H): 10 - 90%
Bell width: 6 cm
Depth: 29 mm
Width: 52 mm
Bell height: 3.96 cm
Bell depth: 6 cm
Height: 146 mm
Wi-Fi standards: Wi-Fi 4 (802.11n), 802.11g, 802.11b
Frequency: 2400 MHz
Wi-Fi: Yes
Connectivity technology: Wired & Wireless
Night vision: Yes
Built-in camera: 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.