Description:   Wireless Home Digital Cordless Doorbell Plug-in Door Chime Bell Kit Set 35 Music   Features:    Easy to use wireless doorbell No wiring required、 plug and play、 and very easy to fit 35 selectable polyphonic ringtones Use the button on the side of the receiver to change the melody to your favourite The receiver and button light up when the button is pressed This is a fully functional and fun doorbell、 also ideal for hearing impaired people   Specification:   Color: White Wireless Doorbell Remote Size: Approx. 45x21x78mm\/ 1.77x0.83x3.07!#!amp!*!quot; Door Bell Receiver Size: Approx. 57x29x95mm\/ 2.24x1.14x3.74!#!amp!*!quot; Power Supply: 1 x AAA battery (Not Included) Receive Distance: Approx. 100m\/ 3.28ft range (Barrier Free Area) Consumed Power: 0.5W Supply Voltage: 220V               Package includes:    1 x Wireless Doorbell Button Remote 1 x Door Bell Receiver 1 x Double-sided Adhesive   Details pictures: