One individually wired 3mm led with bare wire ends, that can be added to existing circuitry. 

Operating voltage: 4v to 12v dc maximum.

Led wired using fine 0.6mm diameter wire, with an overall length of 600mm.

Red wire to denote positive terminal - resistor is wired 100mm in from bare wire end.

Led flashes at a rate of approximately twice per second.

Pack includes:

x1   3mm Flashing Red