Kryptonite Avenue Avenue R-30 Rear Light Kit.

• Rechargeable USB no battery to buy or replace.
• Duration up to 7 HOURS 30 MIN.
• The side lighting doors allow you to see the cyclist as he crosses the traffic lanes.
• Memory Function-Light switches on to the last mode in which it was turned off.
• Energy saving function - 10% power or less, the lights will automatically switch to the lowest lumen output.
• Built-in battery indicator - Red illumination = less than 25%, Green = fully charged.