Customized adapter attachment for Osmo Action series products for a secure and stable audio connection. Once installed, it supports audio input from a 3.5mm mic for clear, high-quality vocal recording, even in high-speed sports like motorcycle racing. The expanded Type-C port can also be used for charging. 1. The 3.5mm port only supports microphones, not headphones. 2. The expanded Type-C port only supports charging when the 3.5mm port is in use with a microphone. Compatibility: Osmo Action 5 Pro, Osmo Action 4