one set one packing; the packing including all kinds of accessories,details as below: 23pcs each carton; the shipping weight is 55kgs each carton 1 * HDMI KVM Extender transmitter 1 * HDMI KVM Extender receiver 1 * DC 12V Adapter 2 * IR transmitter 2 * IR receiver 2 * RS232 plug(3Pins) 1 * User manual