Function Description:

2 Separate Buttons for each color, ideal for astrophotography &night photography. Solid switch control does not worry about yelled by other photographers "Turn off your light".

Button 1 for: Red Light

Button 2 for: White Light 

Specification:

Light Weight: 79g

Brightness:

White Light: 120 lumens in the high bright

                      60 lumens in the low bright

Red Light:     20 lumens 

Built-in Lithium Battery: Working 4 hrs lighting at Max power, 30 hrs at Min power.

Charging time: 6 hrs

Why Red-light:

It takes about 20-30 minutes for your eyes to fully dark adapt when doing photography at night. Red light does not mess with that process. Turn on the white light and you have to start dark adapting all over again.

Why Separated button is key?

Below is what Mr.JimDoty says: After leading dozens of night photography field trips, I have decided one of the most frustrating things to have happened is for someone to accidentally turn on white light and ruin the dark adaptation of the whole group. The problem is some headlamps make you cycle through all the white light settings to get to the red LED. That is a terrible design for night photography. So the most essential feature for a night photography headlamp is a separate button to turn the red LED on and off. It is even better if the red LED button is separated from the white LED button.