It is portable, but batteries, spectral lines adjustable volume is small and exquisite and has excellent power and spectral lines stability. Most types of CO2 laser and easy to carry, and can use the batteries. Stable lasers can through some (such as temperature, micrometer or piezoelectric modulator) and other economical way, make spectral lines, namely no grating adjustable adjust CO2 laser adjustable scope, spectral lines for10.3 um - 10.7 um.