These BIKE SAFETY LIGHTS are a safe and convenient way to illuminate your bike. These lights are visible at distances up to a mile. Convenient rubber strap that attaches to any bike. Long lasting LED rated at 100,000 hours of use. Micro Bike Lights have a rubber strap and curved inner surface that allows the lights to be securely attached to your seat post, handlebars or bike frame.Front and Rear Safety Lights have 2 settings; Steady and Flashing. Requires 2 CR2032 Replaceable Lithium Batteries (included).