Blink Steady, a bike light that doesn’t make you think. No need for on/off switches on this light as it automatically turns on when you start biking in the dark. This tiny durable light is controlled by an accelerometer and light sensor, so when you start riding in the dark, it automatically turns on. The light has two modes; blinking, and solid/steady mode. To switch between modes all you need to do is flip the light. The accelerometer detects the blinking and solid/steady position. The Blink Steady bike light runs on two AAA batteries, that last about 200 hours of continuous run time. It’s also waterproof, and made in the USA with solid machined aluminum.