1). Availble as a single gun (101) or two guns (201) welding System with independent and stepless time and currtent controls. Dual gun System has inter lock feature. 2). Automatic current regulation by fully closed loop D. C. Shunt feedback System ensures consistent delivery of optimum weld energy. 3). Current monitor will activate indicator lamp if desired current can't not be delivered. 4). Digital read out of actual weld time and current of last weld assists in set up and quality control. 5). Solid state control circuitry produces maximum reliability and accuracy of all functions. 6). Two wire control system miniminzes control cable and connector maintenance. 7). Deck weld feature sleectively adds hot plunge time for weld through deck applications. 8). Other features include chuck saver circuit, quick shutdown, lift check, and safety shut down. 9). Same as NELSON6000 profiles and control system. Detail specifications: Transforma Rating 7600 amps Stud range 5/16" through 1"(8mm-25mm) Fusing 400amp@230v and 200amp @460v&550V Timing control 0.1-1.5 seconds, stepless Regulated ourput 400-2150 amps, stepless Case dim 860mm*560mm*1220mm Weight: 450kg. 1300*8000*1500 wooden case.