Vibration start stop: Built in vibration sensing, start immediately with helmet on, automatically turn on and record when vibration is detected, automatically turn off after 1 minute without vibration, and manually activate this function for the first time High definition wide-angle waterproof: 1080P high-definition picture quality, 6-layer glass 150 ° wide-angle lens, wide field of view, waterproof design for worry free rainy days, compatible with 256GB high-speed storage card (not included) Internet sharing: Built in WiFi module, online viewing, editing, and sharing of videos without unplugging the card; Card insertion can be used as a USB flash drive, and USB can be directly connected to a computer for charging and transmission Portable battery life: 1200mAh battery, can record 2 hours on full charge (WiFi not connected), Type-C interface directly connected to computer, 5V 2A charging Portable and stable: lightweight and durable, suitable for multiple scenarios such as cycling and skiing. Two types of tape are used to fix the helmet, making it easy to put on and take off, and easy to operate without wiring