DESCRIPTION: This listing is for five (5) Side Looking, 940nm IR LED Pairs, Emitting Diode SIR4045 and Phototransistor SGPT4045. That's ten (10) pieces all together. Specs are shown in the photos, so please see those as they are an important part of the description.
Free USPS First Class Letter Mail Shipping without Tracking. This sometimes takes 8 to 12 business days in spite of what the post office claims.
If shipping with Tracking is important please choose the USPS Ground Advantage option at check out. All orders of $14 or more will receive free tracking.