Simple rotary switch selection of five test modes, including auto start on connection.The unit is powered from either its rechargeable battery or mains. Capable of delivering 10 A into measurements up to 250 mohm and 1 A into measurements up to 2.5ohm. The duration of each test may be up to 60 seconds. Memory storage for test results up to 200 records Applications ranging from railways and aircraft to resistance of components in industry.