I am selling this rear light because I recently purchased a Garmin rear light. I really liked this product because it's very stylish, but I decided to sell it so someone else could use it instead of keeping it stored away. Purchased in May 2024, I used it about twice a month. The bike was stored indoors, and I only rode on sunny days, so this product has never been rained on. I always pay attention to the battery level to prevent complete discharge or overcharging. It has never turned off suddenly during use. - Brand: CAT EYE - Model: Rapid X - Charging method: USB charging - Brightness: 50 lumens - Lighting modes: 3 modes (constant on, flashing, lamp) (From the Cat Eye official website) A USB rechargeable safety light with a surface-emitting light and a brightness of approximately 50 lumens, which can also be used as a daytime light. Bracketless design that can be easily attached with a rubber band, fitting snugly and perfectly on the bicycle. 6 versatile lighting patterns (high, low, flashing, rapid, group ride, daytime hyper flash) Lithium-ion polymer rechargeable battery Mode memory function starts lighting in the mode it was turned off in Battery indicator equipped Battery auto-save function that switches the lighting pattern to flashing when the battery level is low Micro USB charging cable included Optional spacer X can be used to attach to conventional brackets Optional sharp aero rubber base can be used to attach to sharper seat posts (compatible pipe circumference approx. 95-155 mm) When the battery level is low, the switch flashes, the lighting pattern automatically switches to flashing, and it can be used for about 1 hour afterward. Size: 24.5 x 74.5 x 31mm Weight: 22.5g (body only) Light source: Surface-emitting LED module Power source: Lithium-ion polymer rechargeable battery (standard charging time: approx. 3 hours) Usage time: High: approx. 1 hour Low: approx. 5 hours Flashing: approx. 25 hours Rapid: approx. 14 hours Group ride: approx. 14 hours Daytime hyper flash: approx. 7 hours Waterproof performance: IPX4 Mounting band diameter: Rubber band (diameter approx. 12.0〜32.0mm) Accessories: MICRO USB cable