uxcell Wireless Doorbell Kit Remote Button with 36 Chimes 4-Level Volume, 1 AC Receiver 1 DC Transmitter, 500 ft Range, White RC range up to 500 ft through accurate test in open area. 36 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. 1 million sets of auto-learning codes to avoid interference between doorbells. ABS flame retardant shell material, green environmental protection.