Ultra-long standby time with practical operation - Charge time about 2.5 hours; up to 10 hours of working time for extended shoots. Four-button design for quick control - Easy mode switching, on/off control, fast mode selection, and camera parameter setting all at your fingertips. Synchronized control for multiple cameras - Control up to 5 GoPros at the same time for coordinated shots and efficient workflows. Compatibility and scope - Suitable for GoPro Hero 9, Hero 8, GoPro Max, and similar GoPros, as well as smartphones. Not compatible with other action cameras. Use scenarios - Action sports filming: mount and manage five cameras (helmet, bike, car, drone) with one controller to keep settings aligned. - Event or interview shoots: quickly switch modes and adjust camera parameters across devices while you focus on composition. - Travel and vlogging: streamline multi-camera setups and respond fast to changing scenes without juggling each camera. Professional, reliable operation with clear compatibility and practical controls for multi-camera setups.