Description: X6 rechargeable smart bike rear light, specially designed for cycling enthusiasts. It features long work time, high light, auto power on / off, IPX6 waterproof standard and 6 modes to choose. Practical for outdoor night cycling. Main Features - Built-in 3.7V 900mAh 18350 battery, with 36 hours continuous work time, practical for a long ride - USB rechargeable, can power for mobile phone or PC USB - 16 LED, with 200m visible distance, safer for night cycling - 6 modes to choose (as below pictures) - Night / day auto-detection design, more convenient for you - Cycling auto-detection design to save energy - IPX6 waterproof standard, no worry about light rains - Made of PC + ABS rubber, durable and sturdy to use - A great partner for cycling enthusiastsSpecificationGeneralModel Number: X6 Type: Tail Light Placement: Saddle Tube Suitable for: Cross-Country Cycling,Fixed Gear Bicycle,Mountain Bicycle,Road Bike Best Use: Backpacking,Camping,Climbing,Hiking Material: ABS,PC Color: Black,Blue,Green,RedParametersLuminance: 50 Lumens LED Quantity: 16 LEDBasic InformationProduct weight: 0.0750 kg Product Dimension: 6.50 x 4.20 x 5.20 cm / 2.56 x 1.65 x 2.05 inches Package Dimension: 12.50 x 8.30 x 5.00 cm / 4.92 x 3.27 x 1.97 inchesPackagePackage Contents: 1 x Meilan X6 Bike Rear Light, 1 x USB Cable, 1 x Rubber Ring