Package Included:<br />1*Wireless Doorbell <br /><br />Description<br />1.Waterproof (IP44) wireless doorbell with touch button<br />2.Up to 500ft/150m operation range in open space<br />3.36 melodies with 3 levels of adjustable<br />4.Self-learning code system automatically adjusts to eliminate interference<br />5.Battery powered with no wiring and no electrician needer<br />6.Blue LED indicator<br /><br />Specification<br />Working voltage:3.2V-5.5V<br />Batttery for Recevier:AA*3Pcs(Not included)<br />Batttery for transmitter(Touch boutton):23A*1Pc(included)<br />Volume:60-90DB<br />Transmitter Power：＜10mw<br />Working Frequency:433.92Mhz<br />Shell Color:White，Black