3.5-Inch Wireless Video Baby Monitor – Night Vision, Temperature Sensor, 2-Way Audio Talk, and Nanny Cam Security Camera

Power Supply Information:
The parent unit includes a built-in rechargeable battery and can operate either on battery power or while connected to a power charger.

The camera unit, however, does not have a built-in battery. It must remain plugged into a power outlet at all times during use.