Descriptions Main Features: ● Material: ABS ● Freely programmable, programming text, can be used for bicycle taillight, backpack, helmet, outdoor warning light, etc. ● Built-in 300mAh Li-ion battery for 4 - 5h charging time by USB charging and 12 - 24h using time ● Support multiple languages: Chinese, English, Japanese, Russian, Italian and most European countries languages ( does not support Korean ) ● Install with no tools, no CD included ● IPX6 waterproof design to use on rainy days Specification General Type: Tail Light Suitable for: Motorcycle,Mountain Bicycle,Road Bike,Touring Bicycle Dimensions and Weight Product weight: 0.0500 kg Package weight: 0.0800 kg Product size (L x W x H): 9.20 x 3.00 x 0.80 cm / 3.62 x 1.18 x 0.31 inches Package size (L x W x H): 10.00 x 5.00 x 3.00 cm / 3.94 x 1.97 x 1.18 inches Package Contents Package Contents: 1 x Bicycle Light without CD, 1 x USB Cable, 1 x Bicycle Frame Buckle