Larger LCD display with backlight.
Relative time clock on MAX MIN and AVG provides a time reference for measurement.
Display Sound, Light, Type K Temperature plus Humidity & Temperature simultaneously.
USB interface, USB to UART Bridge Controller..
Low battery indication, and Auto Power Off mode (Sleep mode) increases.
9V battery, K-type temperature probe, %RH probe, dB probe, Anemo probe, photo detector and gift box with carrying case.