Abstract: A coupling for connecting conveyances, so as to allow the flow of commodities from one conveyance to another through the coupling. The coupling includes first and second coupling heads suitable for engagement with each other, and suitable for connection to conveyances. The coupling includes rotary retaining means for retaining the coupling heads in engagement with one another, and latching means for retaining the coupling heads in engagement with one another, whereby the rotary retaining means and the latching means must be simultaneously released to release the coupling heads. When the coupling is engaged, it produces an audible noise. The coupling is adaptable for conveying fluids, electrical power, optical signals, and other commodities. The coupling is adaptable for connection with pipes, hoses, wires, cables, appliances, supply tanks, and other conveyances.