Waterproof Wireless Doorbell with 36 Chimes Single Receiver EU/US Plug Plug-in Type Door Bell Cordless Smart Home Door Bells 1 transmitter+ 1 receiver Features: Receiver: Working voltage: 110-240V Working current: 120mA Power: 2W Music: 36 cord music for option Sound: 25-80dB (4 grade volumes) Remote control distance: 100m (in open air) Work frequency: 315MHz Transmitter: Work voltage: 12V (Battery Model: 23A 12V, not included) PS: If you buy with battery, then we send you the battery inside the transmitter. Work current: 15mA(20 times a day by calculating, a high quality) 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 Temperature: -10 -50 Deg.C Specifications: Plug type: EU, US Material: ABS Receiver: 9.5 * 6 * 3.4cm Transmitter: 8.4 * 6 * 2.3cm Color: black Waterproof: YES CE ROHS Approval Pictutres: User maual Package includes: 1 x Wireless Electronic Doorbell Receiver 1 x Doorbell Button Please noted: the Buyer Questions& answer, one of the buyer answer the battery is AAA 12V isnot correct, please use 23A 12V battery. Waterproof Wireless Doorbell with 36 Chimes Single Receiver EU/US Plug Plug-in Type Door Bell Cordless Smart Home Door Bells Factory selling directly We are the Manufactory, if you need more quantity, welcome to contact us directly.