Quality Metal Material: this doorbell button is made of material that is waterproof and reliable, (tolerance temperature: -4 degrees Fahrenheit to 240 degrees Fahrenheit), a good replacement for your old, yellowed, cracked plastic button Bright LED Light: the LED light doorbell button is on 24 hours a day; Provide visibility after dark and your visitors 't spend time looking for your doorbell; It doesn't get or burn out like bulbs Widely Application: simple wall mounted doorbell button switches with light is classic design that can be applied on stucco or wood surfaces, for front doors or garage door openers Simple Installation: the package comes with mounting screw holes and may not need to be drilled if applied as a replacement doorbell button (the distance between the screw holes is 2 inch); Bell wire is not included Note: working voltage 8-24V; If you use a digital ringtone (play the melody; Speakers with sound), diodes are required (not included); If you are using a mechanical doorbell ring (2 note sound; Like a mallet hitting a metal bar), no diode is needed Color: Black Material: Metal Package Contents: 1 * Illuminated Doorbell Button 1 set * screw 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.