Easy to InstallIt would be very easy to install the wireless door bell,just plug in the doorbell to the socket, remove the insulating piece in the doorbell button, and install it to the door frame with the mounting accessories it comes with.Deaf Doorbell Flashing Light The hearing impaired doorbell has 3 modes, Ringing only - flashing only - flashing when ringing.You can freely switch modes as needed with a simple one-button switch.Long Working Range up to 1200 Feet-The signal of the indoor flashing door bell can be up to 1200 feet in an open area and won't interfere with other devices in your home or neighbors, and the cordless doorbell button provides IP44 waterproof. This will be the practical doorbell wireless for home you'll ever see.1 Doorbell Button & 3 ReceiversThis waterproof and dustproof wireless door bell button has higher sensitivity and lower energy consumption, and it will light up when activated,and 3 receivers can be placed at living room,bedroom,kitchen and so on.36 Chimes & 4 Volume Level The wireless doorbells for home have 36 melodies, 4 volume levels (silent - low - middle - high).The 3 receivers can be set with different ringtones and volumes, and can be used as a silent doorbell.