Features: 1. Extra bright bicycle headlight: 500 lumen bicycle light has 4 light modes: strong/weak/strobe/fog light. 2. Built-in 130 dB bicycle speaker, loud enough to warns you of your presence. It has 5 sound modes (choose according to your preference), long press for 3 seconds to change. 3. Large-capacity battery: Built-in 3000mAh large-capacity battery, easy to charge anytime, anywhere. . 4. Compatible with most devices: width 60-85mm, adjustable clip is compatible with most smartphones. Compatible with most models, most bicycles, electric vehicles, motorcycles and other types of round tube handlebars. 5.Easy to install: Easy to install without tools, suitable for most vehicle handlebars, such as motorcycle/mountain bike/electric bike/folding bike/scooter, etc. Notice: 1.Actual color may be slightly different from the image due to different monitor and light effect 2.Please allow 1-3cm deviation due to manual measurement Description: Material: ABS Lamp beads: T6 Brightness: 500LM Mode: strong light/low light/strobe/fog light Battery: 3000mAh Charging: USB charging Speaker: 130dB (five sound modes) Applicable: Mobile phones with a width of 60-85MM Package List: 1x Bicycle Headlight