A built-in accelerometer automatically switches into a constant burst mode when deceleration detected (braking or slowing down).COB LEDBuilt-in acceleration sensor for Kinetic mode (Automatically turns on High mode when deceleration is detected.)Mounts securely to the seat post with the rubber band (Ø12-32 mm)Lithium-ion polymer rechargeable batteryUSB rechargeable (Micro USB cable included)Low battery indicator3 modes * Charging time: 2hMode memory functionBattery Auto Save (The mode automatically changes to flashing when the battery power gets low.)
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