Specifications:Color: black1.The work voltage of the receiver:220V ， woking current����120mA2.Power�Q2W3.Music: 36 cord music for option4.Sound: 25-80dB ( 4 grade volumes)��5.Remote Control /Incept Distance�R100m(109 Yard)(in open air)6.Work Frequency ��315MHz7.Power Plug: USA plug8.Work Voltage of the Emitter��12V(Battery Model��23A 12V)9.Work Electricity of the Emitter�Q15mA(20 times a day by calculating，a high quality10.LED Indicator��press the send button��LED indicator light will flash，Emitter work and the receiver receive the order and then send out the beautiful music reminded you the VIP visit， the blue-ray LED of the receiver will regular flash along with the music.11.This product is of waterproof function and can be put outside the door12.Temperature: -10 �� ~50 �� (14�H~122�H��Packing list:1 x Transmitter1 x Receiver1 x Sticker2 x Screws1 x User manual