Each unit has a sample input, a trigger input and a S&H output; a clock generator or a noise source is not integrated - here's just the raw sample & hold circuit for patching by yourself.
You can choose with a jumper if each unit acts as a sample and hold or as track and hold. Each two LEDs show if a positive or negative voltage is being held.
per unit: trigger input, sample input, sample & hold output
3U Eurorack module, 4HP wide, 30mm deep
20mA current draw