wireless doorbell (6) Stable long Range:OperSSG Wireless Doorbell with 1 Transmitter and 1 Receive,Operating at over 1000-Feet Range with 52 Selectable Melodies and 4-Level Adjustable Volume,No Battery Required for Receiver,Waterproofating range up to 1,000 feet in open area Low power consumption,The Excellent materials for abs resin provideaningressprotectionlevelofIP44,high temperatureresistance, water-proof, stylish diamond-shape surface with a touch sensing switch,CE,FCC,RoHS certifiedrange of over 500 feet(1000 feet in open area).Either you are occupied in the garden or kitchen, you will always be easily informed when someone is calling from outside. 52 Different Melodies Chimes included happy birthday,merry Christmas song (16 chord). Easy to adjust with 4 levels of volume (from 30 dB to 110 dB.) Easy Installation - No batteries needed for the plug-in receiver. The push button can be fixed to the Doorframe with the attached adhesive tapes 1 Year Warranty: SSG offers you a 100% money back satisfaction guarantee and on top of that 1-year warranty! With nothing to worry about, try it today!