SD Card Feature: 1) Card Form Factor : SD Card (Secure Digital Card) 2) Card Size : 24mm x 32mm x 2.1mm 3)Capacity : 32MB~1GB 4)Interface : SD, SPI, I/O Supported Serial Interface 5) Number of Pin : 9 pins 6)Weight : 2.0g 7)Operating Voltage : 2.7 V to 3.6 V 8)Operating Temperature : -25C ~ +85C