Two CR2032 batteries power this tiny light, which comes complete with a simple-to-use mounting system that enables you to put it more or less anywhere you like.
The four LEDs are arranged with two pointing directly rearwards and two slightly smaller ones pointing out at 45-degree angles. These corner LEDs are shrouded by internal support sections of the lens, which makes them spread their light in a less direct manner. The result is a lightweight (20g), compact unit that kicks out a fair amount of red light for its size. The battery life was surprisingly good, with our test sample running for over 70 hours, some 10 hours more than Topeak claim.