BEST Gift For Families & Friends.Tektalk 's IP44 material doorbell is and radiation-free, which is easy and tight for children or the heavy. 2 transmitters with 2 similar batteries -LRB- Battery life for over 15 months -RRB- and 2 plug-in receivers -LRB- power consumption less than 5W -RRB- to save energy.Up to 36 Chimes to be selected and 4 volume levels to be adjusted according to your favor. Mount the push button with the viscid strip or screws on the door or wall, and plug the receiver into any socket in your home, you will never a visitor 's arrival when the LED indicator loose with the chime. It 's from achromatic color, UV-resistant elastic that holds its honest color longer to preserve the curb appeal of your home. Thanks to 150m/500ft - 280m/1000ft working range, this forward-looking doorbell kit well to let you notice when someone is at the door. Auto-learning codes technology interference from remaining users or appliances. Besides using as a doorbell, it can be to care the archaic and the patient or send emergency notice.SpecificationsDimensions of transmitter : 4.6 * 7.7 * 1.9 cmDimensions of receiver : 7.5 * 7.9 * 2.4 cmOperating up-to-date -LRB- receiver unit -RRB- : AC 110-240V, 50 / 60HzOperating up-to-date -LRB- doorbell unit -RRB- : 12V -LRB- 2 × 23A Batteries, included -RRB- Transmission Range : 280M/1000ft -LRB- Open Area -RRB- Transmission Frequency : 315Mhz / 443.92 MhzPower consumption of transmitter : interior Sounds : 36 chimes .