Easy to use: Doorbell plug and play, The direct insertion socket can be placed in the socket of any room. 
No batteries, no wiring, power saving. 
Specifications: US plug.
Multifunction: The Ding-Dong can choose any 52 ringtones with adjustable volume. 
Wireless long-distance transmission.
Wide range applications: This doorbell can be installed at home or in the office, 
can also be widely used in dormitories, hotels, hospitals, factories, restaurants, and shops.
This doorbell LONG RANGE 1000FT / 300M Either you are occupied in the garden or kitchen, 
you will always be easily informed when someone is calling from outside. 
will not interfere with other equipment in your home or those of your neighbors; 
ensures you will never miss a visitor, even if you are a few rooms away or on another floor.
Easy Installation: Easily plug the receiver into an electrical outlet (no batteries required for main receiver).
The push-button can be fixed to the doorframe with the included adhesive tape or screws(included). 
The push-button is rated IP44 weatherproof and acceptable for outdoor use.
EXPANDABLE & DIY You can DIY to meet your requirement by pairing additional receivers and push-buttons. 
1 Receiver can pair up to 5 Pushbuttons, each push button can pair multiple receivers.
52 DIFFERENT TUNES: Our wireless doorbell is provided with 52 different ringtones 
with 4 levels adjustable volume from 20db- 80db. 
You can enjoy the tone of the music and set your favorite tones as you wish.
Specifications:
Material: ABS(Acrylonitrile Butadiene Styrene plastic)
Size: As shown
Color: Golden
Item Weight: 3.27 ounces
Package Dimensions: 3.86 x 3.78 x 1.77 inches
Operation:
After the batteries are installed（NO batteries）, turn the receiver switch to the selection position (each press for a ringtone, if you want to fix music, the switch to the sound position (music symbol) Can be fixed.