CENTER 350/352 are infrared thermometers. With the gun like shaping, users can aim to the measuring target just by instinct. Both of them have laser indicator to reinforce the directional feeling. Celsius or Fahrenheit can be set through switch. Laser can also be turned off through switch. DS ratio for CENTER 350 is 8:1. If the users need a higher DS ratio, CENTER 352 can do 12:1.