Description:Fully retractable pincer arm for maximum flexibility Auto AC/DC,Large two-line display,Measures the common electrical parametersThe testo 770-1 clamp meter is ideally suited for non-contact current measurement on tightly packed power cables or conductors with a small diameter. The unique grab mechanism means you can grab each individual cable easily and safely. DC voltage: Measuring range: 0.1 to 600.0 V Resolution: max. 0.1 mV Accuracy: ± (0.8 % of mv + 3 Digit)AC voltage Measuring range: 0.1 mV to 600.0 V Resolution: max. 0.1 mV Accuracy: ± (1.0 % of mv + 3 Digit)DC current: Measuring range: 0.1  to 400 A Resolution: max. 0.1 A Accuracy: ± (2 % of mv + 5 Digit)AC current Measuring range: 0.1  to 400 A Resolution: max. 0.1  A Accuracy: ± (2 % of mv + 5 Digit)Resistance: Resolution: max. 0.01 ohm Measuring range: 0.01  to 40.00 Mohm Accuracy: ± (1.5 % of mv + 3 Digit) Frequency Measuring range: 10nF Hz to 100uF MHz Accuracy: ± (0.1 % of mv + 1 Digit)Operating humidity: 0 to 80 %RH Operating temperature: -10 to +50 °C Storage temperature: -15 to +60 °C Overvoltage Category: CAT III 1000V; CAT IV 600V Accessories: TESTO 760-2 Digital Multimeter