Digital Light Meter Pro.(RS-232)TES-1339R 1).Dual Display, 4-digit LCD ... . 2).RS-232 Interface & Software Data Logging Digital Light Meter Pro.(RS-232)TES-1339R Dual Display, 4-digit LCD reading ... digit LCD read out.Measuring Range99.99, 999.9, 9999, 99990, 999900 Lux 9.292, 92.92, 929.2, 9292, 92927 fc ...