Specifications:Material:ABSColor:Blue Red Orange Black(Optional)Functional parameters:DC voltage DCV :yesAC voltage ACV :yesAC current ACA :yesResistor / On-Off Test :yesFrequency F :yesNCV :yesZero line / Fire line test :yesFull unit symbol :yesBacklight manual/Auto off :yesTrue RMS measurement :yesFlashlight lighting :yesHOLD :yesTechnical Specifications:DC voltage (DCV):4V-40V-400V-600V (0.5%+3)AC voltage (ACV): 4V-40V-400V-600V (1%+3)AC current(ACA):15mA-4A-40A-400A-600A (2.5%+8)Resistance: 4k-40k-400k-4M-40M (0.5%+3)Frequency measurement: 4Hz-40Hz-400Hz-4kHz-40kHz-400kHz-Notes:1. When measuring voltage, please do not input the limit voltage exceeding the effective value of DC 1000V or AC 750V;The voltage below 2.36V is a safe voltage. When measuring higher than 36V DC and 25V AC voltage, check whether the test leads are in reliable contact, are connected correctly, and are well insulated to avoid electric shock;3. When changing functions and ranges, the test leads should leave the test point.The 4000counts is a pocket-sized 3 3/4-digit automatic digital instrument with stable performance, high precision, high reliability, clear reading and overload protection. The 4000counts is a pocket-sized 3 3/4-digit automatic digital instrument with stable performance, high precision, high reliability, clear reading and overload protection.Features:1. Display: liquid crystal display (LCD)2. Maximum display: 4000 (3 3/4) bit automatic polarity display;3. Measurement method: double integral A/D conversion;4. Sampling rate: about 3 times per second;5. Over range display: The highest position shows OL;6. Low voltage displaysymbol appears7. Working environment(040)relative humidity80%8. Power: AAA 1.5V battery Batteries excluded9. Volume (size): 1706530mm (LWH)10. Weightabout160gBatteries excluded 1.5V battery11. Attachment: One instruction manual, one outer packaging box, one pair of test leads, Portable storage bag