Fangrui Product Details This Elderly Alert Call Button Is A Reliable Life-saving Device That Works Properly At All Times. As Long As The Button Is Pressed, An Sos Signal Can Be Sent To Caregivers. With A Total Of 4 Levels Of Volume, The Alert Can Be Customized For Your Needs. It Can Receive Signals Up To 30-50m Away Without Obstacles. Note: Do Not Immerse In Water. Keep Your Loved Ones Safe With This Necessary Device. Specification: Product Name: Wireless Call Button Product Size: Button: About 8.5x4.5x2cm/3.35x1.77x0.79in Bell: About 10x6x6cm/3.94x2.36x2.36in Product Weight: About 235g Power Supply Voltage: 5v=2a Power Consumption: Standby 150a Colour: A Red Material:abs Package Contents: 1 * Button 1 * Controller 1 * Data Cable (lanyard Color Is Random, Dont Accept The Specified Color) 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 Little Different From The Real Thing. The Measurement Allowed Error Is +/- 1-3