1、Display: 3.5 digital LCD with a maximum reading of 1999, auto polarity display. 2、Measure method: double integral A/D switch implement. 3、Designed in handheld small size and light weight, its portable to use. 4、Over‑load indication: "1" is displayed. 5、Operating Environment: 0~40 Celsius degree, at&lt;80%RH. Features:1. Display: 3.5 digital LCD with a maximum reading of 1999, auto polarity display 2. Measure method: double integral A/D switch implement 3. Designed in handheld small size and light weight, its portable to use 4. Over‑load indication: "1" is displayed 5. operating Environment: 0~40 Celsius degree, at<80%RH Specification: Display: 3.5 digital LCD with a MAX reading of 1999, Auto polarity display Measure method: double integral A/D switch implement Sampling speed: 2 times per second Over‑load indication: "1" is displayed operating Environment: 0~40 Celsius degree, at<80%RH Storage Environment: ‑10~50 Celsius degree, at<85%RH Power: 2 size AAA batteries (Not include) Low battery indication: support DC voltage: 600V ± (0.8% + 3 dgt) AC voltage: 600V ± (1.2% + 5 dgt) AC current: 20‑200‑600A ± (2% + 5dgt) Resistance: 2K‑200K‑2MΩ ± (1.0% + 3dgt) Package includes: 1 X Digital Clamp meter 1 X Set of test leads