PRODUCT INFORMATION: This rechargeable SpokeLit with Disc-O Select is the most fun and convenient way to increase side visibility while riding your bike. Illuminated by two bright, efficient LEDs, this SpokeLit allows you to set it to one of four colors or leave it in color-changing Disc-O mode. Designed for all your rides, rain or shine, the SpokeLit is constructed with a durable, weather-resistant body that easily attaches to most spokes without the need for tools. Micro USB rechargeable (cable not included). PRODUCT DETAILS: Disc-O Select features four selectable colors (red, green, blue, white) and color changing Disc-O mode Tool-free installation Fits most bicycle wheels Weather resistant Recharges in approximately 1.5 hours using micro USB cable (not included) Run time: 6 hours Dimensions: 4.8" x 1.8" x 1" | 120mm x 45mm x 24mm Weight: 1.2oz | 35g