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 fast, caring care without yelling. 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 pendant. We can also stick it on the bed or the toilet with double-sided tape, so that our parents or children can report in time. Waterproof SOS transmitter: the button call is waterproof. Can be used for bed/toilet solids and can be used for meal/soup splashes. 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. Content : 1 * Remote Control Doorbell Power mode: 100-250 v Supply voltage: 110~250(V) Power Consumption: 0.5 (W) Note: Due to the different images displayed, the actual color shall prevail. Dimensions are measured by hand, there may be errors (1-2cm). Note: The data is all manual measurement, please allow 1 - 3cm error, due of the light and display difference, there will be a certain color difference, depending on the physical object received Delivery Quantity: (according to the main picture)