4GB MicroSDHC Memory Card for Straight Talk Samsung SCH-R451/R451C Cellphone with Free USB MicroSD/SDHC Card Reader -- 4 G/GB/GIG 4G 4GIG Compatible With: Samsung SCH-R451/R451C Capacity & Type: 4GB MicroSDHC Specifications: Complies with SD Association's Specifications Certifications: CE/FCC/RoHS Warranty: 5 Year Manufacturer's