DESCRIPTION: This listing is for five (5) pairs (10 pcs total) Side Looking, 940nm IR LED Pairs, Emitting Diode SIR4045 and Phototransistor SGPT4045. 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, double up on this order, place a separate order or choose the USPS Ground Advantage option at check out. Separate orders will be combined with this one.

All orders are shipped from Russell, Kansas. I do not drop ship. If there is a problem please contact me (send a message) before filing a complaint. Your satisfaction is important, most problems are easy to fix, but please, keep it civil.