AuYou Wireless Doorbells Kit, 1 Remote Button Transmitter and 1 Receiver Door Chimes with LED Indicator, Operating at 300 FT Range with 36 Chimes 2016 Fashion and elegant design doorbell push buttons. ABS material attributes of high rigidity which is also anti-burn and impact resistance. IP44 Waterproof / Dustproof remote button over 300 FT operating range in open area; Wireless range depends on construction and materials. 36 Polyphonic melodies for you to choose for the specific receiver chime,with 3 levels (low, medium, high)volume adjustable (85db) for the wireless doorbell kit. Led flashes on transmitter and receiver for indication purpose; The doorbell receiver not include battery but mounted very easy; CEFCCROHS certified. Package contents: Portable AuYou Doorbell Chime x 1; Button x 1; DC3V CR2032 x 1; Screws x 3; Anchors x 3; Double-side sticker x 1; User Manual x 1.