The meter is a hand held 31/2digital multimeter for measuring and current, resistance, diode, transistor, freguency, temperature and continuity test with battery operated. It is suitable for school, family . Features - - Material: ABS - Size: 14 x 7 x 3.3cm / 5.5 x 2.8 x 1.3inch(LxWxH) - Protective Tube: F500mA/ - Power: 9V NEDA1604 or 6F22 Battery - Display: LCD, 1999 counts, updates2-3/ - Measuring method: Dual-slope integration A/D converter - Overrange Indication: Only figure "1" on the display - Polarity Display: - for Negative Polarity - Working Temperature: 0-40 °C - Storage Temperature: -10°C-50°C - Fit for schools, factories, families and amateur wireless lovers. - Small and compact design. - A great electronic measuring instrument. - The back light of display is optional. - A great electronic measuring instrument. Package list: 1 x A830L Digital Multimeter 1 x Measurement Probe 1 x User Manual