Mobile energy and battery indicator: the bicycle mobile phone holder with power bank 4000 mAh battery can be used to charge your phones and other USB devices. In addition to the switch button of the bicycle light, there is a 4-grid power indicator that allows you to easily track the remaining power and ensure a timely charge. Durable and non-slip - Mobile phone holder bicycle with light with 3 support edges and 2 elastic clips ensure elastic clips, non-slip and stable, cannot be dropped and is suitable for 4-6.5 inches mobile phones, so that your phone stays securely attached to the handlebars of your bike. 5 sound effects - 5 built-in speaker sound effects. Hold for 4 seconds to switch the sound effects. Mobile phone holder bicycle light. Long press to ring continuously, short press to ring twice. The speaker button is external, you can press the speaker at any time. Bicycle speaker. The sound is up to 130 decibels high and warns passers-by and vehicles. 5 hours of continuous life - The brightness of the bicycle headlight is 550-250 lumens, double lamp beads are higher, which can ensure safe driving at night. Full charge of the headlight takes only 3 hours and can be used for 5 hours at the highest setting. There are 3 types of strong light, low light and flash mode. Simply switch the lighting mode to meet your daily operating requirements. Easy and convenient installation- Bicycle headlight thanks to the convenient installation and without tools, the bicycle phone holder can be easily mounted and is suitable for most vehicles. It can be a birthday gift or a festival gift in the New Year, mobile phone holder power bank bicycle, Christmas bicycle power bank holder. Give to your family and friends and enjoy the fun of sports together. Product description Are you still afraid of your phone suddenly turning off when navigating on your bike? Are you confused when you can't see the road at night with your bike? This bicycle headlight is not only a bicycle headlight, but also a mobile power supply, mobile phone holder and bicycle bell. Features a built-in rechargeable 4000 mAh lithium battery with a run-time of 8-12 hours. It can be charged from your computer or any device with a USB port. With its large capacity of 4000 mAh, you can charge your phone on the bike without worrying about power outages. Specifications: Material: ABS plastic. Size: approx. 14 x 5.2 x 3.8 cm (5.51 x 2.04 x 1.50 inches). Mobile phone support: For 4-6.3 inches screens. Features: 4-in-1 multi-function design: 250-550 lumen headlight, 130 decibel horn, rechargeable USB power bank with 2000 mAh / 4000 mAh and mobile phone holder. Safe driving at night with this light: Accentuating headlights, night driving protection, double lamp bead lighting to ensure safe driving at night. 3 lighting modes. High decibel speaker: 130 decibel speakers, no more shouting necessary, up to 130 decibels to top the sounds of passers-by and vehicles. 5 sound modes. Smartphone holder: Transformed mobile phone holder, portable and safe, elastic clips, good stability. Suitable for 4-6.3 inches screens. Convenient USB charging: Mobile charging, convenient and fast, built-in 4000 / 4000 mAh battery with low / high capacity that you can charge at any time. 1 x mobile phone speaker front light.