Single pole holder to mount phone or tablet to car headrest, microphone stand, strollers, wheelchairs, walkers, treadmill, elliptical machine and more posts up to 0.75" in diameter. Features: Works with iPad, iPhone, iPod, smartphones, tablets, and eReaders up to 8 inches wide Mounting clamp can be securely attached to a post up to 0.75" (16 mm) diameter such as a car headrest post, microphone stand pole, etc. 360-degree rotatable holder for vertical and horizontal view Rubber lined clamp for better grip on pole Compact design and portable No tools required Benefits: Handsfree devices use for back seat passengers Handsfree device companion for music and lyrics Keep devices eye level to avoid neck and arm strain for more comfortable viewing experience Keep your kids entertained on long road trips