Feature:1. 1080p Front Camera: Smart bike helmet is equipped with 1080P high definition front camera, which can clearly record every wonderful detail. The head circumference adjuster can be rotated manually, and the size can be adjusted 5661cm at will.2. Multi Channel Airflow Cooling System: Smart bike helmet has multi channel large air holes, which can optimize and guide the cold air flow into the helmet, quickly take away the heat, and make riding more refreshing.3. Front and Rear Lights: The front LED lights help you find your way forward. The rear warning tail light can be controlled by one button, and has a variety of light modes to make riding safer.4. Soft Lining and Chin Rest: The protective lining is soft, breathable and comfortable to wear. The lining is removable for easy cleaning and keeping clean. The high elastic breathable chin rest is soft, comfortable and absorbent.5. Multiple Application Scenarios: Suitable for cycling, electric bicycle riding, skateboarding, rock climbing, roller skating, etc. First person perspective shooting is convenient for your video creation.Specification:Item Type: Smart Bike HelmetMaterial: PC EPSWeight: Approx. 675g/23.81ozVideo: 1080PHead Circumference: 56-61cm adjustableMemory Card: Built in 32GB memory cardBattery: Lithium battery 700mAh /1200MAH (shipped with built in battery).Package List:1 x Smart Bike Helmet1 x Charging Cable1 x Description1 x Storage BagNote:Head circumference measurement method: Put the tape measure around the forehead in parallel, and obtain the data according to the head circumference of the helmet (CM).