Button to regulate width:>maximun width-120mm >minmun width-40mm360 rotating support holder.Cupule&fast release button.Operational instructions:Insert foot-rest to the back of main unit.Move off protection paper from the bottom of cupule.Make cupule of foot-rest direct towards windshield and press then lock it.Press the button for clamp arms extending.put PDA or mobile in the holder and grip it.If you are interested in our products.pls contact us freely.00-86-755-21831668
car Mount Kit Holder for apple ipod products