Features:

• Utilizes four Cree XP-G2 Neutral White LEDs, max 1600lumens output
• Powered by four BAK 18650 rechargeable Li-on batteries,7.4V 5200mAh(NOT INCLUDE)
• 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)
• Weight:888g
  

Operation:

• Press the tail button repeatedly to change brightness to 30%-50%-75%-100%
• Press and hold the tail button for 0.8 seconds to turn off the light from any mode
• Overheating protection: BT40S will accumulate a lot of heat when it is working in turbo output. To avoid overheating, the flashlight will automatically transfer into the high brightness level when the case reaches a certain temperature