Update your existing or aging doorbell system with this wired solution. The audible volume range is 80 m (84 dB), for a loud and clear announcement of visitors or deliveries Choose from 6 tunes with a loud, razor-sharp, digitally amplified 80-meter sound range that you can listen to anywhere in the house With volume control and sleep/mute mode, which mutes the gong indefinitely or for a predetermined period of 3, 6, 9 or 12 hours, your family can relax undisturbed on movie nights or during a nap The halo light ring and LED flash provide discreet yet effective visual warning signals that complement your chosen melody in noisy environments or warn you when the doorbell is not audible Our door gongs are made in a harmonious white palette and are tailored to your home. The gong can be powered by 4 AA batteries (not included) or connected to the mains via an 8-12V power supply Improved connection reliability; all of this is guaranteed by a 2-year product quality warranty. Honeywell Home is a trusted brand with a tradition of high quality Note Always remember to shut off the main supply before installation, by following the transformer instructions