K40 CURRENT AMMETER: This easy-to-use current meter monitors electric current output from your CO2 laser tube in real-time, so you can calibrate your laser power settings to the actual electric current being supplied. 

DEPENDABLE PERFORMANCE: With a capacity of up to 30 milliAmps, a precise analog meter, and a high-contrast white background, this current ammeter is the perfect upgrade for your K40 laser engraver.

EASY TO INSTALL: Simply connect this meter's wiring to the black wire running from the power supply to the laser tube and calibrate the power percentage in your software to the actual mA current being supplied to the tube. NEVER connect the red wire as this carries high voltage.

1-YEAR WARRANTY: No need to worry! This K40 laser upgrade includes a 1-year warranty.