The Dual Voltage Reduced Size MultimediaCard is a small, low-power, removable flash memory card. Compatible with all digital music players, digital camcorders, handheld PCs, cell phones and other devices with a Reduced Size-MultiMediaCard (RS-MMC) expansion slot. Compatible with these cell phone models: Nokia : 3230, 6260, 6282, 6630, 6670, 6680, 6681, 6682, 7610, N70, N80, N90. Samsung : SCH-250, SCH-A770, SGH-D710, SGH-P730, SGH-P735, SPH-G1000, x910. Siemens : S66, S65. Comes with MMC adapter so RS-MMC card can be used in these cell phone models with MMC slot. Nokia : 7710, 3300, 3600, 3620, 3650, 6225, 6230, 6230i, 6600, 6620, 9210, 9210i, 9300, 9500, N-Gage, N-Gage QD. Samsung : B100, D720. Siemens : SL42, SL45i. Specifications: Capacity : 1GB storage. Low Power Consumption: Dual Voltage Support 1.8V/3.3V 100% compatible with all digital devices that feature a Reduced Size MultiMedia Card (RS-MMC)compliant slot. High speed transfer rate (up to 3MB/sec). Can be written to, erased and reused thousands of times with out loss of quality. Low power consumption. Dimensions : 18 x 24 x 1.4 mm. On card error correction. Damage free powered card insertion and removal.