1.Gear type non- washer locking to keep the equipment stable, high quality 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 to use 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:A: Camera Bicycle Holder Colour:Black Material:Aluminum ABS Package Contents: 1 x Camera Bicycle Holder 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.