2Pcs Usb Rechargeable Bike Bicycle Cycling 4 Modes Led Front Rear Tail Light Lamp Specifications: 1. Mode:4 Modes 2. Brightness:15 Lumens 3. Item Color:Red 4. Led Light: Red 5. Package Weight:50G 6. Product Dimension:7X 2X 1.7Cm 7. Mounting Placement:Bicycle Seat Post 8. Bulb Type:Leds 9. Suitable Tube Diameter:12-32Mm 10.Water Features: Usb Rechargeable Bicycle Taillight And Auto Cut Off When Fully Charged. High Quality Internal Lithium Battery, Need About 2 Hours To Be Fully Charged While Be Used For About 12 Hours. Long Steady Bright----4 Hours Slow Flash----10 Hours Super Flash----6 Hours Strobe Flash----8 Hours 4 Modes:Long Bright,Slow Flash,Explosion Flash And Strobe. Super,Make You Riding Regardless Of Rain. High Brightness And Energy Saving Led. Package Include: 2X Bicycle Tail Light 2X Usb Cable Note: 1.Please Allow 1-3Mm Differs Due To Manual Measurement. 2.Due To The Different Display And Different Light, The Picture May Not Reflect The Actual Color Of The Item. Thanks For Your Understanding. 3.As The Tail Light Is New,Maybe Have Some Low Battery Case. Please Charging Before Using.If This Makes Some Trouble For You,We Really Feel Sorry. 4.Please Long Press To On/Off. 2Pc Usb Rechargeable Bike Bicycle Cycling 4 Modes Led Front Rear Tail Light Lamp 【Assured Material】: Durable Material Is Our Product Standard. 【New Design】: The Novelty Of Design Is Our Driving Force. 【Cheap Price】: The Performance Of The Product Is Very Cost-Effective. 【Excellent After-Sales】: We Are Responsible For Our Customers Refunds.