1 PACK Wireless Door Bell Home Security Doorbell Outdoor Waterproof Button & Receiver Bells Indicator Light EU/US Plug Ring Chime 1 transmitter+ 1 receiver This smart wireless doorbell adopts advanced wireless transceiver technology, high-quality voice processing technology, and its performance is stable and reliable. The doorbell, anti-theft, is welcome multi-purpose. Suitable for home, villa, shop, hotel and office, etc. Features: Wireless Door Bell Home Security Doorbell Outdoor Waterproof Button & Receiver Bells Indicator Light EU/US Plug Ring Chime Easy to Install, no wiring required  Remote control range up to 100m in open air, suitable for home, offices, hotels, etc.  Build in anti-interference design, avoid the interference between users    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) 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 Smart wireless doorbell  When you press the button,doorbell will receive the signal and you will hear the sweet tunes immediately.      Pictutres: User maual Package includes: 1 x Wireless Electronic Doorbell Receiver 1 x Doorbell Button Please noted: please use 23A 12V battery. 1 PACK Wireless Door Bell Home Security Doorbell Outdoor Waterproof Button & Receiver Bells Indicator Light EU/US Plug Ring Chime