43-in-1 card reader/writer built in USB 2.0 ,3 port HUB 1.1. USB 2.0 transfer rate up to 480 Mbps... Interface: ... Performance Slot 1: SD SECURE DIGITAL, EXTREME SD, ULTRA SD, SD PRO, SD ELITE PRO, HS SD ULTRA SPEED SD, SD ULTRA X, HS MINI SD, MMC1, MMC2, MMC 4.0 ... , RS MMC, HS RS MMC 4 ...