The Universal Acoustic Coupler was made and would have been used to connect a telephone to dial a computer remotely. The control panel is under the wooden flap. There is a power switch, full duplex switch, 500 Ma Fuse, CCITT Port. When not in use it can be folded up into a small timber carry case with handle.Wooden box with two sections that open. Top section hinged and folds back. inside are controls and cables for connecting to a computer. Instructions for use are on the lid. Front section has clips and folds down to a phone to placed in "speakers". English maker's plate and Melbourne supplier's plate with A.P.O. Permit No. C74/8/903 Serial No. 775326 moore reed, universal acoustic coupler, telephone, remote connection, computer connection