The buttons are 3 different modes light levels/ extended battery life, also 4 or 5 light types, day/night, strobe, alert, walking lights, etc. I'm going off memory, not sure all modes, check link J.R. ur opinion welcome, thanx
NR offers some serious lighting systems, lights look very nice! Most important with self contained power source bike lights is keeping in mind run time. You don't want to end up in the dark before you get home. Give us a review when you can.
Well my NR headlight and backlight has arrived, tomorrow (Thursday) my fat tire crawler ebike arrives from lectriccycles. NR light is amazing : very bright with mutiple settings... I enjoy the feel of the soft rubber strap, also like the ability to easily remove for theft avoidance, and love the USB charging ports on both. Yes, a bit pricey , but top quality stuff: warranty awesome. Here are so me pics: