5-pack of Warm-white micro LEDs. LEDs measure approximately 1mm x 0.5mm, and operate on 3VDC. Maximum current draw is 20mA. Great for use in any situation where a very small point source light is needed, such as a locomotive headlight, or building interiors. For best results when used with DelTang receivers, we recommend a small resistor, between 100 ohms and 220 ohms, be wired in series in the positive LED lead.