Simply velcro the triangle Triviz onto the back of any Nightrider product, hit the switch and the USB rechargeable red light springs into action to enhance your visibility. The light runs up to 16 hours in flashing mode and is supplied with a USB cable to plug into your computer to recharge the battery. Cycling Active Magazine describes this product as "ingenious".
USB rechargeable battery
3 operating modes: Flash, Fast flash & constant
Run time: Constant 12 hours, flashing 16 hours
Triangle measures 16cm x 16cm x 16cm with a full velcro backing