The Defender is a theft-proof and weather-proof bike headlight, and works just fine on any bicycle’s handlebars, regardless of the company or bike model. It will shine bright and “defend” you against the dangers of darkness for years, as long as you are using the bike. The LED lights are powered by three AA batteries that come with the Defender. The batteries are good for 50 hours of steady beam, or double that if you use it as a flashing light.