TES-1333 Solar Power Meter Good quality,cost-effective,environmentally friendly 2000W/M ,634Btu/( ... •Automatic transmission measurements. •Select either power or transmission. •Solar energy power or transmission. •Current time setting function.•User calibration factor ... below 70% RHWeightApprox. 195gDimension111(L)*64(W)*34(H)mmAccessoriesCarrying Case, Operation Manual, 4 pcs size AAA, RS-232 cable ...