RS232 to TTL Serial Converter - DB9 F/M - Bidirectional Transistor transistor Logic Adapter Easily convert an RS232 serial signal (-12 to +12V) to a transistor transistor logic signal (0 to +5V) Bidirectional RS232 to TTL Serial Adapter Platform independent with no drivers or software required Fast and hassle-free setup Supports baud rates up to 115.2 Kbps