An ammeter is a measuring device used to measure the electric current in a circuit . A voltmeter is connected in parallel with a device to measure its voltage, while an ammeter is connected in series with a device to measure its current. Specifications: Working Voltage : 140-270VAC Working Frequency : 50/60Hz Voltage Measurement Range : 150V-260V AC Current Measurement Range: 100mA - 5,5A AC Display :  2 x 3 Digit Display Working Temperature: -20°C.....+55°C Connection Diagrams: Terminal connection, Plug-in terminal Cable Diameter : 2,5mm² Weight: 135 - 155 Gr Working Altitude: <2000m Mounting: DIN-rail mounting or vertical wall mounting, Front panel-mounted Package Includes: 1 x TENSE DAV-72 Digital Voltmeter – Ammeter