Solar power and USB charging (USB input). With solar panels, it can automatically charge in the sun. Built-in 1200mAh high-quality rechargeable lithium battery, which is environmentally friendly, money-saving, safe and efficient.120dB tweeter to ensure the safety of your journey. Integrated horn -5 sound, 120 decibel loudspeaker, long press for 5 seconds to change the ringtone.Not afraid of rain, rain and fogThe bicycle headlight adopts T6 LED lamp beads, with a maximum of 400 lumens (effective distance of 600 feet), and the front bicycle light is super brightColour:blackMaterial:ABS plasticSize:15cm x 3cm x 3.5cmPackage Contents:1 * bicycle lightOnly the above package content, other products are not included.Note: Light shooting and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.