Features: brand new and high quality Prolific PL-2303HX controller, excellent compatibility Full compliance with USB 1.1 & 2.0 specification; Provides dual buffer for upstream and downstream data transfer Support RS232 serial interface ; Supports automatic handshake mode Supports wake-up and intelligent power management .Tiny Plug Type, No more cable Suitable for PDA and modem, phone and GPS etc ; Support Win 98 or above, for MACOS X or above (for Intel based), for Linuxt 7.3/8.0/10 and for Linux Kernal 2.4.31 and above Specifications: Item: USB 2.0 to RS232 9 Pin Adapter Chip: PL2303 Type: Male / Female Plug (Optional) Size:approx 5x3.6cm/1.97x1.42in Feature: Gold-plated Material: ABS+PC Note: Due to the problems of lighting effects and shooting angles, there will be certain tolerances in the product, please understand. Please allow 0-2mm error due to manual measurme Package includes: 1 x USB 2.0 to RS232 9 Pin Adapter