Konus KonusLight-5K Flashlight 2500 Lumen Rechargeable Black 87B55724 KL. Its amazing feature in fact is the Turbo mode which allows for maximum light output in an instant. The #3933 has a basic output of 2500 lumens that becomes 5000 lumens with Turbo mode but it also has a simpler zoom mode. Features of Konus KonusLight-5K Flashlight 2500 Lumen Rechargeable Black: Rechargeable Flashlight With 2500 Lumens Of Power And 5000 Lumens In Turbo Mode Metal Works With A Rechargeable 20650 Battery (Included) 4 Modes:100percent: Power Off After 2hrs 40percent: Turn Off After 8hrs 5percent: Power Off After 10hrs Turbo: Power Off After 10s Zoom Function Waterproof Package Contents: Konus KonusLight-5K Flashlight 2500 Lumen Rechargeable Black Despite its decidedly small footprint this rechargeable flashlight is capable of generating a truly incredible beam of light. Its amazing feature in fact is the Turbo mode which allows for maximum light output in an instant. The #3933 has a basic output of 2500 lumens that becomes 5000 lumens with Turbo mode but it also has a simpler zoom mode. KL3933