1-4 key touch door was the main used in hotel .KTV. Smart Home can be ordered 220V or 12V weak. Please clean interior can be controlled. Do not interfere. Please wait. In the Do Not Disturb state. Doorbell key is invalid Please state if you're clean or canceled, the door can be controlled in a networked state, bedside total off button if you're using automatic start doorbell invalid frame material:... zinc alloy frame color: bright chrome / Champagne / drawing gold / other custom panel Material: tempered glass / plexiglass LOGO: according to the hotel requires a customized room number: the perfect integration of fine silk screen integration effect Dimensions:. 120MM diameter Operating voltage: DC5V AC: 110-280V connection voltage: 12V or 220V can be customized