The Kryptonite XBR taillight uses a built-in accelerometer to provide a brake light which increases output 3x over the steady mode. 7 Modes including a daytime brake mode for 10-36 hours of runtime before needing a recharge via USB.

• Acceleration sensor: when speed is reduced by more than 1.6 m/s, (5.76 km/hr or 3.58 mph) an additional LED is switched on
• Low battery indicator displays red if battery capacity under 25%

Imported.

Manufacturer Bio

In 1971, with $1500, some ingenuity, creative security ideas, and a Volkswagen van, Michael Zane was able to invent the first U-Lock and travel around the US spreading the message of need for bicycle security. Thus, Kryptonite was born.

A legendary test for Kryptonite's new bicycle locks came in 1972. The Second Avenue Bicycle Shop in New York City locked a three-speed bicycle to a signpost in Greenwich Village under Kryptonite founder Michael Zane's direction. Although all of the removable parts were immediately stripped by thieves, the bicycle itself remained for thirty days and thirty nights. The Kryptonite lock and the bike frame were still in place, even though the lock had been attacked numerous times. Publicity from this event gave Kryptonite the boost it needed, forever changing the face of bicycle security. They have now expanded to include quality lighting products.