Fangrui Product Details 4g Sos Alarm Kit Dc5v 1a Power Supply For The Host, With 500mah Backup Battery Wireless 433 Connection: Supports Up To 20 Sensors, 10 Sos Buttons Preset 3 Phone Numbers, Equipped With 3 Separate Call Buttons One-touch Dialing Of All Preset Contacts Alarm Sms Two-way Hands-free Calling Automatically Answer Calls From Preset Contacts Voice Activation No Motion Alarm - Elderly Care (need To Use Presence Sensor) Doorbell Function (need To Use Doorbell Button) Low Battery Warning And Pull Cord Ultra-light Waterproof Sos Button With Lanyard And Built-in 3v/cr2032 Buckle Battery Application Scope: Home, Hospital, Nursing Home, Retirement Home, Etc. Plug Type:eu Plug,it Applies To Indonesia, Germany, France, Spain, Italy And So On Voltage: Dc5v Color: White Material: Plastic Package Contents: 1 X Rescue Call Host 2 X Sos Devices Only The Above Package Content, Other Products Are Not Included. Note: Light Reflection And Different Displays May Cause The Color Of The Item In The Picture A Lit