This is an industry-standard 0.56" 2-digit ultra-bright green LED display, wired as two separate common-anode seven-segment displays, allowing either simple independent driving of each number or a multiplexed arrangement.
These are high intensity, low-power displays, with 2400uCD brightness at 10ma. The datasheet is here: LiteON LTD-6410G
The second product photo shows the display in an operational environment for comparison purposes. All four display types were shot using identical lighting and exposure, in an attempt to show brightness and contrast. Note that there is fairly strong fluorescent stage lighting, therefore the perceived brightness and colour may not be perfectly accurate.