The motion detector is by solar energy, 500mAh lithium battery with super long battery life, monitor your property and safety all day long The sensor has 4 volume adjustments and 38 melodies to choose from. Different bells can be set at different locations, making it easy to identify the area where the warning is issued. he wireless driveway alarm can be fully installed in minutes. Put the detector in the desired position, plug the sensor into the socket, adjust the volume and ringtone of the sensor, and it is ready to use. The solar driveway alarm is weatherproof and can be used in all seasons, with an operating temperature range of -30 to 150 degrees Fahrenheit, making it a very reliable home security and outdoor alarm system. With upgraded technology to reduce outside influence, you can use it in front of your home, driveway gate, store, hotel or office building. Voltage:AC100-240V Plug Type:US Plug, it applies to Canada, India, Mexico, Thailand, , the , the Philippines and so on.