ATEN 2-Port Reversible Bitronics Parallel Auto Switch AF142 (White) Supports IEEE-1284 nibble mode Capable of File Transfer between attached computers Select port through manual button or remote port setting through the as ware port selection Reversible, will operate in either 1 to 2 mode or 2 to 1 mode Unit Package Dimensions 5 x 5 x 1.75; Unit Pack Wt. 0.45 lb.