This multimeter is 4000 count, 3 3/4-digit digital multimeter. It can be used to measure DC and AC voltage, DC and AC current, resistance, capacitance, frequency, diode, temperature, continuity, duty cycle and electromagnetic field radiation. It can be used as a test tool for environment and devices, it is a high-performance and versatile meter. Features: 1)High-performance 2)3 3/4-backlight LCD display, max. reading of 3999 3)Data-hold mode 4)Auto polarity indication 5)Manual range and auto range mode 6)Auto/manual power-off 7)Relative mode 8)Overload protection 9)Low battery indication General Specification  Display: 3 3/4 digit LCD, with a max. Reading of 3999  Over range Indication: OL shown on the LCD.  Negative Polarity Indication: - displayed automatically  Sampling Rate: About 2 to 3 times/ sec  Operating Temperature: 0℃ ~ 40℃,  Storage Temperature:   -10℃ ~ 50℃,  Operating Altitude: 0 to 2000 meters  Power Source: 9V (6F22) x 1 (Not provided by seller)  Low Battery Indication: -+ shown on the LCD  Size: 162 x 83 x 47mm  Weight: about 310g Accessories:  Manual : 1 piece  Test Lead: 1 pair  K type thermocouple: 1 piece (present)