1.Gear type non- washer locking to keep the equipment stable, and clear images easily captured; 2. Aluminium alloy production, durable and corrosion-resistant, rubber gasket, do not hurt the car; 3. Double ball head design, 360 rapid adjustment of the angle; 4.Wide range of clamping, maximum open about 40mm, minimum 25mm, improve the adaptability of more models; 5.1/4inch bolt is widely compatible with sports cameras (POCKET series, ACTION series, INSTAR360 series), remote controls (RC/), mobile phone clips and other use. It is recommended that you do not operate the remote control during . Please make sure the vehicle is stopped and then operate it to avoid accidents when the bike is out of control. It is recommended to turn on the anti-shake function when connecting a device such as a sports camera to stability when . Devices without screw holes are recommended e an adapter such as an adapter. This bike carrier may require an appropriate adapter accessory to connect to the above equipment, which you will need to prepare yourself. type:B: Camera Bicycle Holder+module Colour:Black Material:Aluminum ABS Package Contents: 1 x Camera Bicycle Holder 1 x module Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.