VS035B-33B: 3.3V operating voltage without touch panel. VS035B-33BT: 3.3V operating voltage with touch panel. VS035B-33BTC:3.3V operating voltage with touch panel and touch panel driver. VS035B-50B : 5.0V operating voltage without touch panel and touch panel driver. VS035B-50BT: 5.0V operating voltage with touch panel. VS035B-50BTC: 5.0V operating voltage with touch panel and touch panel driver.