Revtronic BT40S boasts a major boost in visibility as the its optical lens render the 1600-lumen output into a wide, smooth beam. The high-intensity LED is well protected from heat accumulation and physical impact with the sturdy aluminium housing offering optimal temperature management. Powered by 7.4V 5.2Ah external battery pack, the bike light delivers reliable performance and extra safety for your mountain biking, touring, commuting, etc. Revtronic BT40S 1600 Lumens Cree LED Mountain Bike Light Bundle with 5200mAh Rechargeable Battery Pack, AC Charger
Utilizes four Cree XP-G2 Neutral White LEDs, max 1600 lumens output
Powered by 7.4V 5200mAh rechargeable li-ion battery pack
Uses high quality optical lens with a wide beam angle
4-Mode Electronic Switch - Low-Med-High-Turbo
Digitally regulated output - maintains constant brightness
Overheat protection function
4-Color & 5-Mode LED indicator displays remaining battery capacity
Quick to attach and detach using O-ring mounting straps sized for 20mm~35mm handlebars
Made of durable aircraft-grade aluminum
Water Resistant
1.65 in(Diameter) x 1.97 in(Length)
3.7oz(Excluding batteries and accessories)