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Fig1. The front of TD-Solar analyzer
(1) LCD screen: Display brief information;
(2) USB port: Connect to PC (Windows only);
(3) Power indicator: When the device is powered, this LED is on;
(4) Working status indicator: When the device is working, this LED is flashing or on;
(5) ~ (8) Buttons: Switch mode, start/pause, stop, or show more information