120 AC 200 Welcome Doorbell Mechanical 2 Wires Security Protection Surface Mounted Door Bell for Home Office Hotel Feature: Type 120 exposed wired Ding-dong doorbell, 220V voltage two-wire system; The panel is made of imported flame-retardant raw materials, the circuit board is made of high-quality components, and the sound body is made of high-quality steel plate technology, creating a soft and pleasant sound with a long-lasting ding-dong sound; The mechanical design is the best choice for hotels and home furnishing, showing a perfect life experience; The standard ding-dong sound popular in hotels; The appearance is high-grade, ultra-thin and beautiful. Specification: Material: ABS Color: White (as shown) Power supply: Connect directly to 220V power supply Size: 120*70*40mm Packing Instructions: 1. There are hanging holes on the back of the doorbell, which can be directly hung on the fixtures on the wall; 2. Use wired control, 220V voltage power supply mode, connect the doorbell switch in series and connect the power supply to use.