CACAZI C20 Two To Three Wireless Pager For The Elderly Home Care Waterproof Emergency Pager, EU Plug(Black)1. Scope of application: homes, office buildings, hospitals, hotels, restaurants, factories and other places 2. Remote control is available at a straight line distance of 80 meters on open ground 3. 4 level volume adjustment (including mute) 4. 38 pieces of music can be changed at will 5. Button waterproof design, one click to call for help and care for your family 6. 24 hour safe companionship, early detection of emergencies, making care easier 7.