Features: Perform measurements of AC/DC voltage and current, resistance, capacitance, frequency, duty cycle, diode and continuity test. Measuring frequency, AC/DC current and duty cycle by clamp. LCD with backlight & bar graph and clamp lighting bulb. Relative value measurement and auto range function. Provided with one excellent cloth bag for conveniently-carrying. Data holding, to hold the readings while taking measurement. Descriptions: Maximum and minimum value measuring and holding. Automatic indication of functions and unit symbols. Auto power off and low battery indication. Full overload protecting and dual insulation protection. Over-molding rubber case, shake-proof, skid-proof and good touch-feeling. Specifications: Display Type: Digital Only Model: MS2108A Max. V between terminals & earth: 1000V DC or 750V rms AC Operating temperature: 0 to 40 Celsius Degree (32 Fahrenheit to 104 Fahrenheit) Storage temperature: -10 to 50 Celsius Degree (10 Fahrenheit to 122 Fahrenheit) Operating altitude: Max. 2000 meters (7000 ft.) Max. diameter for conductor: Diameter 26mm Max. displayed value: 4000 digits Auto polarity indication: "-" for negative polarity Over-range indication: "0L" or "-0L" Converter rate: 3 times/sec; Bar graph: 30 times/sec Auto power off time: 15 minute Power supply: 3 * 1.5V AAA battery (not included) Size: 20.8 * 7.8 * 3cm / 8.2 * 3.1 * 1.18in Measurement specifications (accuracy): AC Current 40A/400A : 2.0% DC Current 40A/400A: 2.0% DC Voltage 400mV: 2.0% 4V/40V/400V: 1.0% 1000V: 0.7% AC Voltage 4V/40V/400V: 0.8% 750V: 1.0% Frequency By A range (current clamp) 10Hz/1kHz/>1kHz: 1.5% By ACV range 10Hz/1kHz/10kHz: 1.5% Resistance: 400/4k/40k/400k/4M 0.8% 40M: 1.2% By Hz/DUTY range 9.999Hz/99.99Hz/999.9Hz/9.999kHz/99.99kHz/999.9kHz/9.999MHz: 0.5% Package includes: 1 x Digital Multimeter 2 x Test Lead 1 x Instruction Manual Because of the airspace controls not include battery