The Klein Tools AEPJS1 Is A Powered Speaker That Provides High-Quality Sound For Smart Phones, Tablets, Computers and Other Audio Devices Via A Wireless Connection or Wired Auxiliary Input. It Answers Calls Hands Free With The Built-In Speakerphone and Can Be Magnetically Attached to Any Steel Surface, Attached to Klein'S Lighted Tool Bag (Cat. No. 55431), Mounted to A Standard 1/4-20 Tripod, Attached to A Lanyard, or Simply Stood Up On Any Solid, Level Surface.