This wireless portable doorbell set from Byron is easy to install Features: All you need is the supplied double-sided tape to attach the waterproof doorbell button at your front door and place the wireless doorbell anywhere in the house Thanks to the wide work range, the distance between the wireless doorbell push button and the doorbell receiver can be reached up to 175 m The doorbell does not wake anyone up, thanks to the mute function However, you still know that someone is at the door via the flashing LED lighting You can choose your favourite melody from the 8 options on the doorbell and also set the maximum 85 dB volume as desired, which can be selected at 25%, 50%, 75% or 100 % sound level You can take along the chime as you move around the house or garden with its portable design Specifications: Dimensions: H:8.7 x W:4.7 x D:7.6 cm Colour: White Material: Plastic Model Number: 436761