Did you know that USB actually stands for "U Son (of a) Bitch"? The term was developed by a foul-mouthed, regular-battery-using, botanist from Bucharest when he learned you could recharge your super-powerful Boomer USB off any one of the world's billions of power ports.

FRONT

BURN TIME up to 3.5hrs (steady), up to 12hrs (flashing)

DIMENSIONS 62 x 33 x 30 mm

WEIGHT 42 grams

BATTERY Rechargeable Lithium-Ion polymer 

LED SPECS Super-bright HIGH powered white LED

LED LIGHT OUTPUT up to 55 Lumens

REAR

BURN TIME up to 3.5hrs (steady), up to 12hrs (flashing)
DIMENSIONS 68 x 41 x 30 mm 
WEIGHT 46 grams 
BATTERY Rechargeable Lithium-Ion polymer 
LED SPECS Super-bright HIGH powered central red LED + 2 High powered peripheral flash LEDs
LED LIGHT OUTPUT up to 15 Lumens

MODES 1. Strobe Flash 2. Strobe Pulse 3. Random Strobe 4. Steady 5. Storage Mode*

Recharge via USB. WATERPROOF!! superslim, flexible silicone body. Integrated lens and housing. Hold button down to 'turn off' in any mode. Low-battery indicator in lens. Smart battery saving storage mode.

*STORAGE MODE 

The battery discharge feature has been integrated into the electronics to optimize battery longevity. This feature should be activated when the light will not be used for an extended period. (i.e. more than a month) To activate mode simply hold down power button for 5 seconds after a full charge cycle. The LED will be active until the battery reaches the correct discharge level to which the LED will turn off and the unit will be safe for storage.

- If unit is stored for more than 3 months, repeat battery discharge feature

- Recharge battery to full before use after storage mode.

Knog Boomer USB instruction manual

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