FOR A MORE progressive HOME ? . IT ALL AT YOUR DOORSTEP. Proxelle 's unprecedented radio set doorbell is, nobody, and ultra uncomparable - like a time-honored doorbell, except with a bunch of supernumerary perks. It 's and well-to-do to install with its radio set built - so you can begin using this doorbell almost immediately. It 's a built in LED indicator, so you 're always redolent when you 've got a house call. SPECIFICATION Volume : 30-110dB, 4 Levels functional Frequency : 433 MHz ± 280KHz functional Range : 280 ~ 300M Bell Tones Choices : 52 Bell Tones Receiver Voltage : AC 110 ~ 130V -LRB- US -RRB- Transmitter Battery : 12V23A Alkaline Battery functional Temperature : -30 ? . ~ ? . textile : IP44 Box Contain : Transmitter * 1, Chime * 2, 12V 23A Battery * 1, separate modest Accessory for InstallSCROLL UP NOW AND CLICK `` ADD TO CART '' TO TRANSFORM YOUR HOME WITH THIS WIRELESS DOORBELL ! .