Nitecore TUBE Rechargeable LED Keychain Flashlight (45 Lumens)

Operation Instructions: 
Low Output: With the light turned off, press the button to enter low output. Press once again after 3 seconds of use to turn the light off.
High Output: With the light turned off, press the button twice in quick successions to enter high output. Press the button once again to turn the light off.

Momentary Illumination:  With the light turned off, press and hold the button for more than 1 second to enter momentary-on in high mode (45 lumens). Simply release the button to turn the light off.
Infinitely Variable Brightness: When in low output mode, press and hold the button for more than 1 second to access infinitely variable brightness mode. To set a desired brightness level, simply release the button when it is displayed. Press the button once again to turn the light off. The light does not have a memory function for variable settings.

Battery Charging: 
Connecting: Plug one end of the USB cable to the Tube’s USB input port (on the side of the light) and plug the other end in to a power supply (USB adapter, PC or other standard USB output port). To fully charge the Tube when depleted requires approximately 2 hours.
Charging indicator: A power indicator light integrated into the Tube’s button will illuminate steadily during the charging process and go out when the Tube is fully charged.

NOTE: The Tube will need to be recharged if output appears to be dim or the light becomes unresponsive.