TSS 312B Record Annotator with cable and plug. The left of the object has an LCD screen which portrays event, time, date, aux a, aux b. There is a number pad on the right of the object and a red on/off switch. The back of the object has sockets at the top for four channels. Each channel has four entries: Signal output, signal input, trig input, trig output, event switch input, pulse input and pulse output. The back of the object has sockets in the middle for digital input, digital output, remote keyboard, aux 1 input, aux 2 input, character amplitude and manual input. The back of the object has sockets at the bottom for remote display and ieee-4888 GP18 input.