Fangrui Product Details 1. Uni-t Ut673pv Solar Mppt Meter Solar Panel Maximum Power Tester Maintenance Diagnostic Tool 2. The Ut673pv Solar Mppt Meter Can Effectively Identify Any Abnormalities In Solar Panels By Testing Their Maximum Power, Peak Power Voltage, Peak Power Current, Open-circuit Voltage, And Short-circuit Current. 3. Equipped With A Large Screen And Automatic Measurement Function, This Device Can Display All Measurement Results Simultaneously. Its Portable Design Facilitates Easy Carrying, Significantly Improving Operational Efficiency For Pv Manufacturers, Installers, And End-users. 4. Open-circuit Voltage Measurement: 12-60v +- (1. + 5) 5. Power Measurement: 5-800w +- (1. + 5) 6. Load Current: 0-35a +- (1. + 5) 7. Power Supply: Does Not Require Batteries. 8. Unit Weight: 155g 9. Unit Dimensions: 142 X 76 X 22mm