Our wireless doorbells, 1000FT operating range, 38 melodies and 3 adjustable volumes, 2 plug-in receivers (optional) will work individually and simultaneously to remind you in time when someone visits. Offering two melody modes --music selection (Light press of music selection button to choose your preferred chimes, then pressing the ring bell, it is always this chime and will not change) and music circulation (Long press the music selection key for 3 seconds when you hear the ticking, then pressing the bell, it will shift to next chime), choose one you preferred. Featured with low-power consumption, energy-saving and environmentally-friendly, widely used in your home, apartment, office, warehouses and etc.. *1000FT OPERATING RANGE - 315MHz Stable wireless technology offering up to 1000FT transmission range in a spacious space while 164ft with barrier. 2 Plug-in receivers will not interfere in other equipment at your home or those of your neighbors; ensures you will never miss a visitor. *38 MELODIES & 3 ADJUSTABLE VOLUMES - Powerful speaker delivers rich and crisp sound with 3 adjustable volume levels (25dB/50dB/75dB). LED indicators of receivers and transmitter alerts impaired hearing people. Offering two melody modes --Music Selection (Light press of music selection button to select the preferred tune) and Music Circulation (Long press the music selection key for three seconds when you hear the ticking, change to another one). *DURABLE & LONG SERVICE TIME - Adopt ABS materials, lightweight but durable. Abrasion-resistant transmitter can serve up to 13 years. High-graded battery can serve up to 1 year, low power consumption, energy-saving and environmentally-friendly. *WIDELY USED - Widely used in your home, apartment, office, warehouses and etc.. Optimal for compound building, if you have a first floor and basement, garage, or second floor and you want both areas to ring from someone when pressing the transmitter button. *EASY & QUICK INSTALLATION - Just plug the receiver into a socket and fix the transmitter on a wall with the accessories provided which using two screws or strong adhesive stickers to position. Note - Repair asks for the help from professional repairer in order to protect our doorbell. Install them in a place sheltering from rain and sun directly lighting. Brand - Fresh Fab FindsProduct Type - Wireless DoorbellPlug Available - US/UK PlugReceiver Charging Socket - 110V (US Plug), 220V (UK Plug)Receiver Rated Voltage - AC 220V, 50HzTransmitter Working Frequency - 315MHz±2MHzControllable Receiver Volume - 25-75dB (25 dB, 50dB and 75dB)Chime Tunes - 38 ChimesReceiver Standby Current - ＜1.0mAh Transmitter Working Voltage - 12VTransmitter Working Current - ≤15 mARemote Controller Power - ＜10mwOperating Range - 50m/164ft, 100-305m/328-1000ft (in Spacious Place)Included Battery - 23A, 12V Alkaline BatteryMaterial - ABS MaterialUK Receiver Size - 9.9×5.3×5.5cm/3.89×2.08×2.17inch (L×W×H)US Receiver Size - 9.9×5.3×4.5cm/3.89×2.08×1.77 inch (L×W×H)Per Receiver Weight - 63g/0.139lbs Transmitter Size - 7.3×4×2cm/2.87×1.57×0.787inch (L×W×H)Transmitter Weight - 36g/0.079lbsPackage size - 10×10×7cm/ 3.93×3.93×2.76inch (L×W×H)Package weight - 208g/0.459lbs2 × Doorbell Receivers1 × Doorbell Transmitter1 × Adhesive Sticker2 × Screws1 × 12V Battery1 × User Manual