Specifications: Material: Plastic + dense sponge Maximum Load: 2KG Interface: standard 1/4-20 screw Length: approx. 17cm Clip: 5.5~8.5cm How To Use Bluetooth Wireless Remote Control: 1.Pairing a. Turn on the shutter by switching the on/off button, the shutter will enter into pairing mode and indicator LED starts quickly at the same time. b. Activate the Bluetooth function on your phone and sourcing the devices around c. Select the device of “AB Shutter 3” from the list and paring will be finished automatically in few seconds. 2.Select APP Use inbuilt camera App to taking the photos via AB Shutter 3,or you can download the APP of “camera 360″from Google play if inbuilt camera cannot be supported, check the compatible device and APP in following instruction. 3.Shooting Select a correct APP and press the proper button on the shutter for IOS and Android phones to taking the photos.