The LTC-3710HR displays are Common Cathode 0.3” (7.62mm) height four digit displays in a high-efficiency red colour based on GaAsP technology. Features include low power requirements, high contrast and a wide viewing angle.

Manufacturer Name: Liton Electronics
Package Style: DIP
Number of Characters: 4
Color: Red
Character Height: 8mm
Peak Wavelength: 630nm
Luminous Intensity: 750u cd
Forward Current: 10mA
Forward Voltage: 2.8v
Maximum Forward Current: 20ma

Full datasheet available here on the LTC3710HR.