The Sarabec Chimeflash is an extra loud doorbell for hearing impaired people. The Chimeflash is a portable wireless doorbell for hard of hearing people, with many great features such as ultra-bright flashing LED lights, extremely loud sound with volume control, as well as indicator symbols. This is the perfect flashing doorbell for the deaf, and will also suit people with visual impairments or people who just need a good, loud doorbell with excellent range and reliability. The extra loud wireless doorbell lets you choose how you would like to be alerted, either by Sound only, flash Only or Sound and Flash together. The wireless feature means you can take the portable doorbell with you, whether you're in the kitchen, living room, or even out in the garden! Its impressive transmission range (up to 300m) gives you peace of mind so you know when someone is at your door. .............. The Bellpush has a brilliant mounting system whereby you have a mounting plate that fixes to the door, frame or brickwork, you then attach the push to the plate, which means no more opening up of the bellpush when its time to change the battery, the bellpush is also waterproof and is rated to IP56. The bellpush uses the CR2032 coin cell battery type which is supplied with the system. There is a Green confidence light around the push button which lets you know that the push has been activated. .............. Up to three different transmitters can be paired up to one receiver, giving individual sound and LED indications for each transmitter. A Vibrating pad can be purchased separately which will allow the Chimeflash system to alert you whenever your doorbell rings via vibrations. Simply connect it to the receiver, and place the vibrating pillow under your pillow or next to you wherever you go. https://www.sarabec.com/produc... A telephone transmitter can be purchased separately which will allow the Chimeflash system to indicate and alert you whenever your landline telephone rings.https://www.sarabec.com/chimef... A Sound sensor is now also available which can be attached to an intercom system or anything emitting a sound such as existing doorbell and entry alarm Chimeflash Sound Sensor What's in the box? Chimeflash Bellpush with Mounting Plate (Sticky Pad fitted)Chimeflash Receiver3 x "C" size Alkaline Batteries1 x CR2032 Battery2 x Wallplugs2 x ScrewsInstructionDrilling Template What's in the box https://youtu.be/hh9eIDs2TBs Bellpush battery installation https://youtu.be/Y5FfvTNnqXU Receiver battery installation https://youtu.be/dhkoRuMOGjw System programming guide https://youtu.be/_p7b6gVA3jo Changing sounds on the receiver https://youtu.be/xMHFTf7s7BM