describe Four in One Multifunction Powerful four-in-one multifunctional bicycle light, Can be used as bicycle headlights, mobile phone holders, Mobile power supply, electric horn. It can also be used as an emergency flashlight. The speakers have 5 sound effects. Press and hold for 3 seconds to switch sound effects. Super bright LED bicycle light, Instantly improve your vision and safety, Ensure the safety of riding at night. [4000 mAh rechargeable battery] Bicycle headlights can be charged via USB cable, A micro USB charging port can be charged through a computer or any device. 4000mAh large capacity rechargeable battery It only takes 3-5 hours to fully charge. Working time in medium light mode is 8 hours, The working time in the highest light mode is 4 hours. This can also be used to charge mobile phones. Ultra stable phone holder The bicycle front light is suitable for mobile phones with a width of 5.8-9cm. Universal adjustable width of bicycle mobile phone holder Make it suitable for any mobile phone under 6.4 inches. The phone holder is made of high sponge pad and non-slip silicone material, Can provide comprehensive protection for your mobile phone, Make sure your phone is in the process of riding Fasten it firmly to the bicycle handlebar.