USB 2.0 9pin Header Port 1 to 4 Extension Port Multiplier Extend 9 pin USB 2.0 port to 4* 9 pin USB 2.0 ports Connector A: 9 pin USB 2.0 male, connector B: 4x 9 pin USB 2.0 female PCB Demension(L*W): 1.96in*0.98in(5cm*2.5cm)(Approx) Cable Length:12in(30cm)(Approx) With double sided foam tape, it is available to fix on the main board or chassis NOTE: Both of PCB boards could be divided into single board. Please do not worry about using when the item you received is 2pcs single boards