This bike phone holder has a extra bag compared with other bike phone holders. The phone bag may keep your phone safe and away from dust and water, not blocking your vew at the same time. 360 rotatable base mount offers good viewing angle, so you can keep your phone in any direction as you like. Feature - Color: Black - Mount Material: ABS - Size S: external size 138x75x30mm ;interal size 125x60x25mm - Size M: external size 150x85x30mm ;interal size 135x75x25mm - Size L: external size 160x100x30mm ;interal size 150x85x25mm - Size XL: external size 183x110x30mm ;interal size 168x92x25mm - This waterproof bag case comes together with a bike phone base stand. - Made of durable and stable material, it keeps your devices sealed away from water, rain, dust, dirt and sand. - 360 rotatable base mount presents the good viewing angle, so you can keep your phone vertical or horizontal as you like. - It contains two removable EVA pads, which allows you to apply the perfect level of pressure on your phones. - The diameter of the cradle is adjustable, just loosen or tighten it to fit your handle, no other tools required. - Please refer to the size chart before placing an order.