The Hands Free Mobile Mate is a convenient magnetic phone holder that securely fits into the air vent of your car. It allows you to navigate through music libraries, pick-up and make calls or view a GPS navigation system whilst driving safely on the road.It includes 2 metal discs of the same size that you can attach to the back of your phone or phone cover.Laser engraving can be applied to the plates supplied.ABS / 3.5 ( dia ) x 4.5 ( h ) Black presentation box: 4 ( l ) x 4 ( w ) x 6 ( h )