Compact black Morse code key transmitter with a rectangular press-down button and lightning bolt symbol embossed on the top surface. A circular depression is present beneath the symbol. The device is mounted on a rectangular base with a round control knob at the lower end. Attached to the transmitter is a grey insulated wire ending with a metal plug connector.
The key is designed for manual operation, allowing the user to send Morse code signals by tapping the button to complete an electrical circuit.