About the Rapid X3 Rear Light - 100 Lumen The Cateye Rapid X3 is Cateye\\\'s most powerful rear light. Producing a whopping 100 lumens of bright red light you can be seen from over a mile off. The COB LED strips help to produce some eye-catching flash modes and working with great optics, the lights beam is broad and wide. With 6 modes, you can pick the best one that suits the weather you\\\'re riding, and with the auto battery save, the mode will automatically change to flashing when the battery power gets low. Once the battery has finally run out, simply plug the light into your laptop, computer or USB Wall plug for instant charging. The light can fit on to pretty much any seat post, even aero posts! The light is quick to remove and install on to your bike, use the rubber O-ring supplied and attach to your seat post. Key Features Light Source: Bright COB LED strips Brightness: 100 Lumens Power Source: USB rechargeable battery Run Time - High mode: 1 hr - Low mode: 5 hrs - Flashing mode: 30 hrs - Rapid mode: 16 hrs - Pulse mode: 16 hrs - Vibration mode: 8 hr Charge Time 3 hrs charge time Battery Life Indicator: Yes Mounting: Simple O-ring attachment Light modes 6 modes: - High mode: 150 Lumens - Low mode: 20 Lumens - Flashing mode: 30 Lumens - Rapid mode: 50 Lumens - Pulse mode: 20 Lumens - Vibration mode: 30 Lumens Dimensions: 7.4cm (H) x 3.1cm (W) x 3.9cm (D) Extra Features Battery auto save Low battery indicator Light mode memory Weight46g (with batteries) Lighting Buying Guide