Specification:
Brand:NIGHTWATCH 
Model: NI40
LED: CREE XHP50.2 Dedomed 3800lm,Luminus SST40 CW 2400lm,Luminus SST40 NW Dedomed 2000lm,Luminus SBT90.2 5000lm 
Max output: 5000lm 
Battery:  26650 (not include)
Bezel: stainless steel 
Lens:         Glass with anti-reflective coating
Body:        Aluminum with Type III hard-coat anodizing
Swtich:  20mm,10A reverse switch
Ingress rating:   IP68, underwater 2 meters
Weight:      254g without cells
Dimensions:    53 mm head x153mm length
Function: 1. Reverse polarity protection
                 2.Temperature control, 50°C will step down 
                 3.low voltage warn
Modes: T-H-L-M 
      triple clickes strobe 

for SBT90.2:

Moon-Low-Medium-High 

    double clicks Turbo ,triple clicks strobe.

2.NI40 Host
just the driver and led not include 
MCPCB include 
  

SBT90.2