1. MINI USB port with DC5V power supply and built-in lithium battery.2. LCD display + four-wire jack: a group of circuit power supply, a group of circuit test.3. ESR table: Some capacitors can be compared for comparison test only outside the range of ESR value reference table.4. Widely used: inst ent maintenance, school experiments, engineering development, scientific research engineering, production lines, electronic equipment, etc.5. Reset button: open circuit reset when testing capacitance, short circuit reset when testing capacitance, ESR. (Note: large voltage capacitor must be discharged before testing) Straight plug discharge socket: test large voltage capacitor can be inserted into the capacitor pin, discharge socket, after the completion of automatic discharge to test (note: discharge socket can not be directly used for testing).Model number: MEC-100Accuracy: up to 1%Capacitance: 0.0uF-470,000uF(470mF)Internal resistance of capacitor: 0.00-470.0High resolution: 5 digitsMeasuring voltage: Less than 0.8 volts (V)Clamping voltage: -1.25 V(open circuit voltage)Built-in battery: Lithium battery chargingExternal power supply: 5V micro-USB portOperating current: Greater than 80 hoursColour:BlueMaterial:plastic Package Contents:1 x ESR Multimeter Aanalyzer Only the above package content, other products are not included.Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.