RS232 serial null modem DB9 male to female cable enables a connection between serial devices at a distance of up to 3 meters - Constructed with high quality 28 AWG tinned wires with aluminum mylar cable shielding and shielded metal shell connectors help prevent EMI interference - Specifications: 3m (9.8ft) Serial Port Male to Female Color: Black Serial Crossover Cable Note: This is not a straight-through serial cable