Bell's Arella Series bicycle lights utilize super bright, flat LED technology, allowing you to Be Seen by traffic in low light conditions. The Arella X50 rechargeable tail light uses a silicone mounting strap for quick, easy, no-tools installation on nearly any size seat post. This tail light can be run in steady, strobe, or flash modes. The Arella X50 features a fuel gauge that shows how much charge is left (Green=75%, Orange=25%-75%, Red=<25%). When the time comes for recharging, you can plug the light directly into a USB port; no cable is needed. And because all Bell lights are tested and rated to industry-recognized FL-1 standards, you can rest assured they perform as advertised. Specifications: Brightness: 30 lumens; Run time: 1 hour (steady) / 3 hours (strobe) / 4 hours (flash).

• USB rechargeable, easy, saves money on batteries
• Plugs into charger or computer. No cablet needed
• 3 modes: Steady, Flash, Strobe, press to change
• Advanced lens design, compact, fits in a pocket
• 30 lumens brightness, far for approaching traffic
• Quickly installs on any seat post, easy to remove
• Alerts motorists to protect your ride, day & night
• 1-4 hours run time when fully charged
• Tested & rated to industry-accepted FL-1 standards
• RoHS Compliant for environmental safety