Sinvitron Wireless Doorbell kit with 1000 Feet Operating Range, 36 Chimes, 4 Level Volume, ABS Material IP44 Waterproof/Dustproof Portable Wireless Door Bell Kit (S03) (1 Transmitter + 1 Receiver) Fashion design make your door elegant, high end visual effects. ABS material attributes of high rigidity which is also anti-burn and impact resistance IP44 Waterproof/Dustproof Portable Door-Bell Kit, 500 feet operating rang and 1000 feet in open area. Wireless range depends on construction and materials 36 various melodies for you to choose for the specific receiver chime, with 4 levels volume adjustable for the wireless doorbell kit Easy Installation without wiring. Plug receiver into an electrical outlet. Mount transmitter through double-sided adhesive tape or included screws / anchors. Package contents:Sinvitron Doorbell Chime x 1,Button x 1,Battery 12V 23A x 1,Screws x 2,Double-side sticker x 1,User Manual x 1