Features: 1.The meter is a hand held 3 1/2 digital multimeter for measuring AC/DC voltage and AC/DC current, resistance, diode , transistor, freguency, temperature and continuity test with battery operated. 2. Fit for schools, factories, families and amateur wireless lovers 3. Small and compact design 4. A great electronic measuring instrument 5. The back light of display is optional Specifications: Protective Tube: F500mA/250V Power: 9V NEDA1604 or 6F22 Battery (Not included) Display: LCD, 1999 counts, updates2-3/ect. 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: -10C-50C Size: approx. 145 x 70 x 31 mm Weight: approx.140g ( No battery ) Color: Blue+Black Package includes: 1 x A830L Digital Multimeter 2 x Test Probe 1 x User's Manual