<p>The BF5 series fiber optic amplifiers are available in single
  and dual display models. The units feature 5 different response 
  speed settings, for flexible and reliable detection of fast 
  moving targets or small objects. With integrated mutual interference
  prevention, reliable detection is possible with multiple units 
  (up to 8 units) with connection using side connectors. Other 
  features include saturation prevention function, inverted 
  display, and simple sensitivity adjustment settings. Red,
  green, and blue LED light source models are available 
  for diverse applications.</p>