SleekLighting Bike Safety Light Set (4pcs) - 2 Pairs of Super Bright 10,000&ndash;13,000MCD LED Lights - Tool-Free Installation & Removal - 2 x CR2032 Batteries Included SUPER BRIGHT LED lighting set comprising 1Pair with single LED bulb and 1 pair with dual LED bulbs. FAST, EASY & TOOL-FREE installation and removal for maximum convenience and efficiency. Long battery life lasting over 24 hours of bright illumination and visibility from 2 x CR2032 batteries. Multifunction switch offers you the flexibility to choose from continuous light, fast flash or slow flash light. DURABLE construction with silicon and plastic materials in addition to LED life exceeding 10,000Hrs.