uxcell US Plug 52 Ring Tunes Portable Plugin Waterproof Cordless Wireless Door Bell Kits 2 Doorbells Chimes Receivers 1 Remote Push Button Transmitter Gray RC range up to 1000 ft through accurate test in open area. 52 chimes included: pick one you like from modern to old fashioned chimes. Multi-levels of volume loud enough and low enough so it will not disturb any sleeping children. Using learning code to prevent interference from other wireless transmitters. ABS flame retardant shell material, green environmental protection.