Adjustable Volume: Features 4 different volume levels, ensuring the doorbell is audible in every corner of your home or office, perfect for the elderly or those with hearing impairments. Versatile Plug Options: Comes with both US and EU plug options, making it suitable for a wide range of electrical outlets and ensuring easy installation anywhere. Wireless Convenience: Enjoy the simplicity of a wireless setup that eliminates the need for complicated wiring, making it easy to install and relocate as needed. Plug Type:US Plug,it applies to Canada, India,Mexico, Thailand, the , the Philippines,Taiwan and so on. Voltage: AC220V Color: White Material: plastic Package Contents: 1 * Doorbell 1 * Receiver Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.