Acebeam BK20, a newly designed compact bike light, has a super bright light output to 2000 lumens, which is achieved by 2*XHP35HD LEDs; and a maximum beam distance of 180 meters. The decent bike light BK20 is powered by 2*21700 batteries and pumps out 2000 lumens at max.. In addition, the featured dual beam system gives a very nice light beam, and lights up the front road without affecting others. BK20 is charged via a handy micro USB charging cable which is compatible with a wide range of mobile phone chargers etc... The well-built professional BK20 is the primary light for the night time riding.