Audio Pulse Model One Digital Time-Delay System with Wiring harness and full manual. Been tested and works fine! Very nice overall condition, nice clean face plate, all knobs work fine. Thers is a hi-fi stereo buyer guild reprinted from Hi-Fi Stereo Buyer Guid Nove-Dec 1976. There is $600.00 written in pencil on the top page. Interesting piece of audio gear. Orginal Price $629.00. Shipping and handling U.S. $28.90 w/delivery confirmation & Insurance. International $72.90.