I/O Port PC (D-sub) x1 (V-Sync) Monitor out (D-sub 15pin) x1 (for computer 1 only) S-Video in (Mini DIN 4pin) x1 Composite Video in (RCA) x1 HDMI x 2 (one share with MHL) USB Type A x1 (power supply, 5V, 1.5A) USB Type Mini B x 1 (Download & Page up/down ) Audio in (3.5mm Mini Jack) x1 Audio out (3.5mm Mini Jack)x1 RS232 (DB-9pin) x1 IR Receiver 2 (Front/Top) Security Bar 1