The attachment mechanism does not match my bicycle. There is a notch similar to the attachment and detachment of one-touch wheels, but there is no gap in the handle that can be tightened using this notch. (Because the shift lever is on both sides of the handle and the handle itself is not uniform thickness) It may not be able to fix firmly unless you purchase another fitting tool. (Currently struggling)
I think it is a problem to charge 9 hours to charge. Also, it is difficult to open the battery lid, so it is difficult to replace the battery when the battery runs out. Because I used coupons this time, I could purchase it at a much lower price than the market price, but I think that other companies' cheap headlights + rechargeable batteries are better CF, usability is better.