BT40S is a wide beam and high brightness mountain bike front light. Utilizing four Cree XP-G2 Neutral White LEDs, four brightness modes, max output 1600-lumen. It including 7.4V 5200mAh BAK rechargeable li-on battery,more than 3hrs on high output. BT40 is the ideal illumination gear for mountain biking, touring, commuting, etc.
 

• Utilizes four Cree XP-G2 Neutral White LEDs, max 1600lumens output
• Powered by four BAK 18650 rechargeable Li-on batteries,7.4V 5200mAh
• 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
• Premium Type III hard-anodized anti-abrasive finish
• Water Resistant
• 42mm（Diameter）x50mm(Length)
• 105gram(Excluding batteries and accessories)