For more information please contact me! vivi ***** (email: auto_TPMS(at)hotmail com) tel: 86-755-83901980 One-Hand Automotive Pen Digital Multimeter OBD51 Professional design for automotive diagnostic and test can be used with on hand with bright light used in darkness Digits LCD display,Max.reading 3999 Data-hold function Auto ranging Auto power off Overload protection Specification DCV:400m-4-40-400-600V ACV:400m-4-40-400-500V OHM:400-4K-40K-400K-4M-40MΩ CAP:4n-40n-400n-4μ-40μ-200μF FREQ:9.999-99.99-999.9-9.999K-99.99K-999.9K-30MHz DUTY:0.1%~99.9% Diode Check:1.5V/1mA Size/weight:230x44x30mm/110g Application Measure output in sensors like Oxygen (O2),Pressure (MAP), Coolant Temperature,Throttle Position (TPS),Manifold Air, Manifold Air Flow (MAF) etc Check grounds Voltage drops and continuity across ConnectorsWires, Cables, Relays Contacts, Lamps, Switches, etc Check components like Alternator Diodes, For more information please contact me! vivi ***** (email: auto_TPMS(at)hotmail com) tel: 86-755-83901980