SHANRENSmart Bike Tail Light, Ultra Bright Rear Bike Light, USB Rechargeable Auto On/Off, Waterproof LED Bicycle Lights, Rear LED Cycling Light Fits to Any Road Bikes, Easy to Install (Seatpost Fit)

Other than the way it attaches to your saddle rails (I don't like zip locks), this is a marvelous unit. Really well built, you can feel the quality as soon as it's in your hands. It takes quite a few turns to have it sit in its housing, which gives you confidence it won't fall off by itself. The brightness and quality of the light is outstanding. And because the button is in the centre, you can turn it on and off while you're riding. Great value.

I would recommend the light, i took it for a test ride and it was awesome that the light brightens as i braked and switched off as i left the bike for a while conserving they battery.

Light was okay until after only a few short weeks it died never to turned on again.No recourse to get in contact with the supplier for any warranty

Very happy with the product at the start, unfortunately after first charge never turned on again.

works well very bright easy install