Model Number:VUDX2STM2MCI504H6OF Colour:15l Black Item Weight:275 Grams Capacity:15 litres Special Features:Waterproof Item Weight:275 g Description: 1. Comes with reflective strips and LED lights. 2. Can be easily assembled on your own cycling backpack. 3. Wireless control, safe to use while riding. 4. It has 4 LED signals: left, right, forward, stop, from turn signals to urgent signals, reminding drivers to keep their distance. 5. Charge it from your computer or any device with a USB port and stop wasting money on batteries. Specification: Name:Cycling Backpack Size(approx.):length400mm/15.75in;width250mm/9.84in;height150mm/5.90in Weight:about260g Capacity:15L Color:Black Material:polyester+waterproofnylon Lampbeads:30LEDlights(includingchargingindicatorlights) Lightboard:85*70mmdisplaylightboard Battery:500mAhrechargeablelithiumbattery(built-in) Features:Wirelessremotecontrol,waterproofnylonfabric,USBcharging(includingchargingcable). PackingList: 1X15LRemoteControlLEDIlluminatedBackpack 1XRemoteControl 1xManual 1XUSBChargingCable Reliable MaterialUsing polyester and nylon material, Cycling Backpack is waterproof and durable, and it provides and long-lasting performance. 4 LED SignalsLED Backpack has reflective strips and 4 LED signals: left, right, forward, stop, from turn signals to urgent signals, reminding drivers to keep their distance and ensure safe driving at night. Wireless ControlTurn Signal Backpack can be remotely controlled wirelessly. The wireless transmitter is tied to the bicycle, and multiple users can use it at close range at the same time without interfering with each other. Built-in Rechargeable BatterySince the LED Turn Signal Backpack has a built-in rechargeable battery, you can charge it on any device with a USB port. Multiple ApplicationsBike Turn Signal Backpack is suitable for outdoor activities such as cycling, camping, hiking, outings, travel, and daily leisure.