One-piece emergency call button for the elderly/elderly alarm bracelet/call button/wireless pager/elderly buzzer/alarm receiver Ideal as an alarm for people who need quick help, such as the elderly, children, the disabled, pregnant women, or the sick. Simply press the call button and receive prompt and attentive care without shouting. It can also be used as a doorbell. Emergency alert: We can put it in our pocket or use the necklace (included) to hang it around our neck as a pendant. We can also stick it on the bed or toilet with double-sided tape, so our parents or children can report in time. Waterproof SOS transmitter: The call button is waterproof. It can be used for solids in the bed/toilet and can be used for food/soup spills. And installed on the toilet, it is suitable for the following places: home, nursing home, clinic, hospital, etc. Long wireless range: 300 feet in open areas. Chime Unit has 55 ringtones to choose from. 5 adjustable volume levels from 0db to 110db. Simple setup: This paramedic paging system supports pairing between multiple receivers and transmitters. Package includes: 1 * Remote Controlled 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. Dimensions are measured by hand, there may be errors (1-2 cm).