Ideal as an alarm for people who need quick help, such as the elderly, children, disabled, pregnant women or sick people. Just press the call button and get quick and thoughtful care without having to shout. It can also be used as a doorbell. Emergency alarm: We can put it in our pocket or use the necklace (included) to hang it around our neck as a pendant. We can also attach it to the bed or toilet with double-sided tape, so that our parents or children can report in time. Waterproof SOS transmitter: The call button is waterproof. Can be used for bed/toilet fixed material and can be used for food/soup spills. And installed in the toilet, it is suitable for the following places: home, nursing home, clinic, hospital, etc. Long wireless range: 90 meters in open areas. The chime unit has 55 ringtones to choose from. 5 adjustable volume levels from 0db to 110db. Easy installation: This paramedic pager system supports pairing between multiple receivers and transmitters. Package contents: 1 * Remote doorbell Power supply mode: 100-250v Power supply voltage: 110~250(V) Power consumption: 0.5(W) Note: Due to the different display images, the actual color shall prevail. The dimensions are measured by hand, there may be errors (1-2 cm).