Modern Wired Doorbell Chime Kit with 2 Tones for Business, Home, Store, not including transformer The doorbell kit is connected with 16V transformer for sustainable service unless power is cut off, reducing the dependence of traditional battery doorbell kits on batteries. Durable shell material, no need to worry about the risk of fading after prolonged use. The hilly protrusion of the doorbell housing protect the internal parts and increases stability. Specification Material: ABS plastic Color: white Doorbell buttons color: white Compatibility: 16V 10VA transformer(not included) Light color: yellow Shape: rectangular Doorbell Button size: 2.8 x 0.9 x 0.6 inch/ 7.2 x 2.2 x 1.5 cm Package includes: 1 x Doorbell chime box 2 x Doorbell push button switches 4 x Screws Note: 1. Before purchasing, please confirm the layout of the electrical wiring at home and whether the voltage is compatible. 2. This kit does not include a transformer. 3. Please allow a little error on the size due to manual measurement. Lighted Doorbell Button: the housing of the doorbell button switch is made of strong plastic shell, which is not easy to be destroyed, even if it is pressed thousands of times, it can still be intact, and it can also emit yellow light in a dim environment, so it is easy for guests to visit at night; The wired doorbell chime is suitable for the most doorbell 2 Tones Effect: the doorbell wired has 2 sound effects, one is a crisp ding dong sound and the other is a mellow ding dong sound; The ringing sound of the doorbell is pleasant that will not disturb pets, babies, or your neighbors; With 2 doorbell buttons installed, it can tell you exactly where your visitors are with different doorbell tones Compatibility: the wired doorbell kit is only for 16V 10VA transformer apply, please measure the voltage value accurately before connecting the power supply to avoid a short circuit; Suitable for mounting to any surface, the doorbell is also loud enough to be heard in any corner of the room Surface Mount: the doorbell chime cover is very easy to install: The base has 3 ports; Connect the 'TRANS' to a 16V 10VA transformer, connect the 'FRONT' to front doorbell button and connect the 'REAR' to rear doorbell button, and connect the doorbell kit to the live wire and electric wire in the room one by one; The doorbell push button adopts a universal wall mounted structure, suitable for home inside any wall Included in Package: the inside of the package contains a total of doorbell chimes and 2 pieces of doorbell chime buttons, the wired doorbell kit also comes with 4 screws for easy installation; The switch button size is 2.8 x 0.9 x 0.6 inch/ 7.2 x 2.2 x 1.5 cm; This kit is an ideal choice for home essentials; Note: not include transformer