TELESIN Universal Pistol Trigger/Shutter Gun Gadget Kit Compatible with GoPro Hero3 / Hero3+ / Hero4,TELESIN Dome Port and Xiaomi Yi Action Cameras (Trigger+Hand Grip+Clip) Brand NEW and Unique design,a pistol shutter trigger design to working with most of floating bobber models in market All-in-one structure compatible with HERO3/3+/4 cameras,Xiaomi Yi cameras,TELESIN Dome Port for GoPro One-handed operation. Split structure,trigger and floating hand grip are sold separately Direct screw up the gopro to improve stability,with additonal cellphone clip holder adapter on top, for easy viewfinder and swith the position angle Two options for you to choose: Pistol Trigger with Grip/Pistol Trigger without Grip