Bike Light by Ziyue- Super Bright Strap Release Design Bike Flash Light Kits Set for Front and Rear Bike light One-Touch Switch Design, EASY INSTALLATION. No tools needed. Clip on/off.Kinds of Switch:Full light, Flash, Slow Flash ,Water Resistant Shower Proof Design. Kinds of Switch:Full light, Flash, Slow Flash ,Water Resistant Shower Proof Design. Mounts to Any Bike Quickly and Easily by Looping the Strong Silicone Loop around the Frame, and Hooking to the Light. Powered by 2 pcs CR2032 Batteries (included) Solid, Durable, Extend Strong. LED Light is individually tested, so you can be sure it will arrive in good working order.