4VWIN Wireless Doorbell Plug-in Push Button with 36 Chimes, 4-Level Adjustable Volume, Battery-operated Transmitter, Reaches 1000 Feet Distance

1Transmitter+1Receiver this item also can be used great for commercial space and offices. This item also work well for large homes or villas. This item also can be used as a simple alert device. A paging device for the elderly, can signal for care when they need it most. Specifications: Wireless Range: Over 1000ft (280m maximum in the OPEN AIR) Tunes: 36 selectable options Volume: 4 level adjustable levels Power supply(receiver): AC 110-240V Power supply(transmitter): 1 x 12V 23A (not included) Frequency: 433.92MHz Plug Type: Standard US Plug Package Includes - 1 x Push Button (Transmitter) - 1 x Plugin Chime (Receiver) - 2 x Screws - 1 x Double-Sided Adhesive Tape - 1 x User Manual