Customer Display Features40 characters in 20 columns by 2 lines format.Supports a wide variety of languages with code pages.RS232 serial interface or USB interface for data communication.Power is sourced from USB interface, no external adapter needed.Power on time: 30000 hours.Compatible with popular customer display command sets. 2 Lines Multilingual Customer Display GC01 FeaturesHigh brightness vacuum fluorescent display for excellent visibility.40 characters in 20 columns by 2 lines format.Supports a wide variety of languages with code pages.RS232 serial interface, USB 2.0, Bluetooth or WIFI communication (optional).Power on time: 30000 hours.Command set: ESC/POS and CD5220,10 command sets.etc. 2 Lines Multilingual Customer Display GC02 FeaturesHigh brightness vacuum fluorescent display for excellent visibility.40 characters in 20 columns by 2 lines format.Supports a wide variety of languages with code pages.RS232 serial interface, USB 2.0, Bluetooth or WIFI communication (optional).Power on time: 30000 hours.Command set: ESC/POS and CD5220,10 command sets.etc. 2 Lines Multilingual Customer Display GC03