Xiaomi Smart Doorbell 3S

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