This probe is a self-contained instrument; it measures positive polarity dc high voltages up to 40 kV. It consists of two interchangeable screw-in contact tips, a direct- reading meter, ground clip and high-impact ABS case This case has excellent insulating properties, light weight and is resistant to damage. One tip is a round needle type for general use, the other is a special flat spring type for easy access to a CRT anode. An alligator type clip lead provides a secure earth ground connection. A rugged, core magnet-type meter is supplied. It is reasonably free from the effects of outside magnetic fields and can with stand moderate shock and vibration without damage. The probe was factory calibrated at 25 kV. Under normal conditions, it should not require periodic calibration. This probe is typically used to measure high voltages in TV sets, power supplies, laboratories and tor general high voltage commercial applications. 1 year manufacturer warranty. Voltage range: 0 to 40KV DC. Input impedance: 600MO, nominal. Accuracy +/-3percent of full scale. Measures 16-1/2" length by 2-1/8" width by 2" height with a 34" long ground cord.