Lunettes de soleil légères pour vélo de montagne et de route, rechargeables par USB, avec caméra 4K UHD et casque de vélo de sport

Caution 1. First time use, please remove the protectiveflm of the (1)camera to avoid affecting the clarityof the video. 2.The helmet contains electronic parts inside.Please do not take a long ride in the rain althouahthe helmet can prevent the rain from splashing. 3. After the helmet is wet by the rain, take a clothto wipe it and put it in the vent to blow dry,otherwise it may cause electronic malfunction. 4. The helmet contains the battery.The batterycapacity varies with temperature change.Thebattery life can decay when the helmet is used atlow temperatures or below Zero degreesCelsius. 5. if the electronic functions do not work, pleasecharge the helmet for 3 hours and then check if itworks normally. 6.To prevent data loss or electronic failure, pleasesave memory card data and backup regularly.