FEATURES: "Unique 40A high-precision low current measurement--0.01A high-resolution, 1.6% high-precision measurement" "The clamps are slim, lightweight, and portable, making them ideal for use in small, confined spaces" "The large backlight display facilitates readings in dark environments" Current frequency measurement Precision down to 0.01A and 0.1V 1000A/600A AC/DC current measurement (319/317) 600V AC/DC voltage measurement 4000Ω resistance measurement Continuity beeper Auto off function enhances battery life, meaning the instrument can work when you need it screen store ‘hold’ function for capturing a measurement result on the screen 317 Electrical Specifications Current AC Range 40.00 A, 600.0 A Resolution 0.01 A, 0.1 A Accuracy 1.6% ± 6 digit (50-60 Hz) {40 A} 2.5% ± 8 digit (60-500 Hz) {40 A} 1.5% ± 5 digit (50-60 Hz) {600 A} 2.5% ± 5 digit (60-500 Hz) {600 A} Crest Factor add 2% into spec for CF > 2 3.0 Max @ 500 A, 2.5 Max @ 600 A AC response rms Current DC Range 40.00 A, 600.0 A Resolution 0.01 A, 0.1 A Accuracy 1.6% ± 6 digit (40 A) 1.5% ± 5 digit (600 A) Voltage AC Range 600.0 V Resolution 0.1 V Accuracy 1.5% ± 5 digit (20-500Hz) AC response rms Voltage DC Range 600.0 V Resolution 0.1 V Accuracy 1% ± 4 digit