Bullet points:1. Memory logic function: Press and hold 1.55 within 5 seconds to turn it off. After 5 seconds, the gear will not be adjusted, and it will turn off by pressing once. The next time it is turned on, it will be turned off. (There is no need to adjust the light source gear every time)2. Strong visibility: 110 meters visible white/red light, with flash mode and continuous mode. Whether it is raining or foggy, it is clearly visible at night.3. Easy to use: The multi-functional fixing clip can be clamped anywhere, bike parts, clothing, bags, trekking poles, etc.4. Life time: 250 mAh rechargeable battery, 5 hours continuous mode in white light, 9 hours flash mode; 9 hours continuous mode in red light, 15 hours flash mode.5. Small and compact: only 16 grams can be carried with you.Descriptions:Name: USB rechargeable bike lightMaterial: PlasticSize: 46*30*20 (mm)Battery: 250 mAhPackage included:1*Bike light