No Wires No Mess- Wireless and 1300ft long range connection distance (in open air), 2minutes fast installation, it allows you to install this wireless doorbell anywhere in the house. Up to 110 dB sound, can be heard the ring all over the house. Easy to Assemble in Two Minutes- This functional doorbell wireless set is pre-set. All you have to do is plug the doorbell receiver into a socket and fix the push button in where you want (Avoid installing on metal) with the double-sided adhesive tapes or screws. 55 Melodies--55 ringtones for you choice in different situations need, including traditional door knock, alarm bell,christmas melody, birthday song, emergency caller etc. There is LED indicator on this plug in doorbell wireless, it will light up when press the push button. You can hear and see who is ringing. 5 Adjustable Volume-The volume of this wireless doorbell plug in can be set from "zero" to 110dB. The sound works through house walls well. The wireless doorbell receiver is transportable from room to room,you can hear the sound clearly in you house. Set the silent mode when you don't want to be disturbed at the luanch time,meeting at home or sleeping.