Professional Digital Insulation Multi-Tester FEATURES: -3 3/4 Digit (4,000 counts) Big LCD Display -Auto-ranging measurements for Insulation Resistance UP to 40,000Mohm, ACV/DCV, ACA/DCA, Resistance, Capacitance etc. - High ACV test ranges: 500/1,000/2,500V - LCD Backlighting, Data Hold-on & Function Selection provided - Overload protection - Special Insulation Test/Stop Button provided - Testing Time Selection: 1/2/10 minute - Short Current below 1.5mA - Insulation Resistance Ranges: 500V:400K~200M ohm (+/-3%+5dgt) 1,000V:200M~4G ohm (+/-5%+5dgt) 2,500V:4G~4-G ohm (+/-10%+5dgt) - DCV range:400mV ~ 1000V (+/-0.8%+2dgt) - ACV range:4V ~ 700V (+/-1.0%+5dgt) - DCA/ACA Range:40mA~ 400mA (+/-1.0%+5dgt) - Resistance Range:400~4Mohm (+/-1.0%+3dgt), 40M: (+/-3.0%+3dgt) - Capacitance Range: 10nF ~ 40uF (+/-2.5%+7dgt) - Power Source: 1.5V R6 AA Size Battery x 6pcs - Dimensions & Weight: 170 x 156 x 64 mm, & 650g approx.