Please note, this item ships from an international seller. Expected delivery is 10-15 days. Specification Material: ABS Color: red Brightness: 100 lm Discharge time: 4.5 hours of strong light, 6 hours of medium light, 14 hours of low light, 25 hours of slow flash, 28 hours of fast flash, 6 hours of strong flash Charging time: 0.5 hours Product size: 6.3x2.7x2.8cm Battery capacity: polymer battery 500 mAh, 3.7v Gear: 6 gears (strong light, medium, weak light, strong flash, slow flash, fast flash) Packaging: 1 * light 1 * USB cable Advanced design. The rear light has a built-in 500 mAh, 3.7v rechargeable polymer battery. It comes with a charging cable that can be charged from a computer, a power bank or any device with a USB port Six-light mode: 6-speed smart taillight (strong light, medium light, low light, strong flash, slow flash, fast flash) Easy to install: As shown in the picture, it is very easy to install. Installation does not require any tools, installation and removal only takes a few seconds! In addition, it can also be adjusted 360. Think about it: bicycles, strollers, dog chains, hats, helmets, backpacks, handbags For safety: the taillights emit a striking wide-angle beam (allowing a 100m field of view), which can be seen from far away from the block, so you donLt have to worry about being knocked down by others Discharge time: 4.5 hours of strong light, 6 hours of medium light, 14 hours of low light, 25 hours of slow flash, 28 hours of fast flash, 6 hours of strong flash