Review on 🚴 2 Sets USB Rechargeable LED Bike Light Bundle - 2 Super Bright Front Bicycle Headlight & 2 Back Rear Taillight - IPX4 Water Resistant - 4 Light Modes - Includes 6 Straps & 4 USB Cables - Ultimate Safety & Style for Biking by Paul Dobson

I just opened up my flashlights and found that two straps broke right out of the box. I bought them based on functionality including the attachment device (strap) which looked like a flexible attachment method. Two sets of lights come with 4 necessary straps and 2 extras in case they break. Six straps came, but two of the six were broken. So no backups. Without those unique straps, I don't see an easy way to attach them. Since they have to be removed every time they need to be charged, this is likely to be an issue. I guess they sent extra ones due to a glitch. So if the straps are off and you don't have any additional accessories, the lights become useless. Doesn't give a good start. I will revise my rating when the seller sends a replacement. Thoughts are the headlights were excellent for the price but the taillights lost all power after only 2 nights of very little use (1 hour max). It is not advisable to remove the backlight to charge after a single use. Except that straps are tricky to work with and will likely break sooner or later. I have no intention of charging the taillights after every use and reinstalling them every time I leave the house after dark. I'll keep looking for something useful.