The lights in the TRIGON range are all executed with an elegant and striking 3D-patterned texture. The USB-rechargeable TRIGON 15 SET consists of the TRIGON 15 headlamp and matching PYRO rearlight. \n \nEven though the design of the set is quite unique, it is not the only thing which distinguishes it in the market. It is especially its extremely long battery lifetime which puts this light set apart from other lights. Next to this, it has a USB-rechargeable lithium-polymer battery, which makes the set environment-friendly and very easy to use. Both headlamp and rearlight have a safe-switch button, which means you need to press a couple of seconds to turn the lights on and off.