Knog Blinder Right, that's a great rear light. 8 lighting programs and all very useful. High battery durability and quite fast charging. Mega power of light. The rack version for mounting on the trunk has a standard 50 mm screw spacing and an adapter from 50 to 80 mm with a set of screws, washers and nuts plus an Allen key. Charging from USB c, two charging control diodes, red and full green. Handle with a locking magnet plus a clip for attaching to clothes, belts, bag pockets, etc. The quality of workmanship is first league.