I'm selling a tail light because I bought a new one. I purchased it on September 10th and used it for less than two months. All accessories are included, but the outer box was torn when I opened it. 【To save on shipping costs, I will send it in an envelope in an opened state】 Please be aware of this when purchasing. The following is an excerpt from the Amazon product page: Innovative Group Frequency Mode: It works in conjunction with the surrounding TL03 pro, breathing and flashing at the same frequency. The lights of the riders in front synchronize and breathe and flash, making it easier for following riders to observe, greatly improving visibility and ensuring safer cycling. Tail light with brake warning light that can be turned on/off: The brake light can be turned on/off manually. Colorful 6 lighting modes & battery level check available: You can switch between 6 modes. 　Seven-color breathing cycle flashing (18 hours) 　Red/blue alternating flashing (60 hours) 　Rapid flashing (red/blue/purple alternating) (24 hours) 　Constant lighting (15 hours) 　Flashing (60 hours) 　Breathing flashing (24 hours) Light sensor & automatic lighting mode equipped: It automatically turns off when it detects high-sensitivity light during the day. It automatically turns on when it detects insufficient light. Also, if no vibration is detected after 120 seconds, the tail light will automatically turn off, and it will turn on immediately when vibration is detected. IPX6 waterproof & USB-C rechargeable: No batteries required, with a built-in 300mAh battery, rechargeable via USB-C.