This new gadget can clamp magnetically to the back of a smartphone to provide an instant audio upgrade and the ability to use wired headphones and earphones.

If you’re serious about wired audio, there’s now a MagSafe headphone amp and digital-to-analog convertor for iPhone. MagDac adds not...

This new gadget can clamp magnetically to the back of a smartphone to provide an instant audio upgrade and the ability to use wired headphones and earphones.