Features: Compliant with standards: CF specification Ver3.0, IDE/ATA66 specification. Standard IDE interface: trueIDEmode, and supports DMA66 transmission. Supports two types of cards, CFI and CFII: IBMmicro hard drives that also support CFII interfaces. The IDE interface is a 40 pin/2.54mm female connector: this card can be directly inserted into the IDE socket. Using the CF card as a DOM: Automatically powered from the IDE 20pin or external floppy drive power socket.5.0V or 3.3V power supply: Choose the appropriate power supply voltage basedonyour CF card. Specifications: Item：40pin 39pin Desktop CF to 3.5 IDE Adapter Card Size：Mixed Package Includes: 1PC 40pin 39pin Desktop CF to 3.5 IDE Adapter Card note: Please allow 0-1cm error due to manual measurement. please make sure you do not mind before you bid. Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you