COMPACT LIGHT & BRIGHT. A really smart compact USB (Universal Serial Bus) light which can act as either a front or a rear... its a 2fer Spec;ANSI FL-1IP-65 Waterproof WHITE Front: High: 60lms @ 2hrs Strobe: 60lms @ 6hrs RED Rear: High: 20lms @ 3hrs Strobe: 20lms @ 9hrs Power Logic: Push button on Push button to cycle modes Push & hold 1sec for off Mode memory returns to last setting Micro-USB &8804;3hrs recharge cord included 18 grams Meets ANSI FL-1 Standard This standard was created by the American National Standards Institute (ANSI) to provide consistent performance measurements for handheld lights. Although bicycle lights are not required to follow this or any standard Blackburn believes in offering full transparency in how the output run time water resistance & other performance claims are measured. Front or Rear Capable With the push of a button the 2 Fer can switch between a white 60 lumen front light & a red 20 lumen rear light. Holding the button for 2 seconds turns the light on & off & pushing the button once changes modes between white solid red solid white flashing & red flashing. The light also remembers which mode you were last using & turns on in that mode. Excellent Side Visibility Amazing 180 degree bezel allows for excellent side visibility. LED Fuel Gauge/ Charge Indicator A small built in LED light indicates the battery level. Green = >75% Orange = 75-25% Red = Universal Light Mount The silicone mount fits diameters from 22-35mm along with a clip for clothing bags or racks. Charging cable included no tools required Lithium Polymer battery Waterproof to IP-65 standard 3 hour recharge time 18g / 0.04lb each Front 60 Lumens Runtime: High 1.5hrs Flashing 5hrs Rear 20 Lumens Runtime: High 1.5hrs Flashing 5hrs