Representative photo · we photograph your actual box before it ships
FreeStyle Libre 3 Plus Sensor | NDC 57599‑0844‑00
One sensor per box · 15-day wear
Is this the right one? Not FreeStyle Libre 3 (not Plus) · not FreeStyle Libre 2 Plus
You're looking at FreeStyle Libre 3 Plus Sensor | NDC 57599-0844-00.
Exact box: NDC 57599-0844-00. Factory sealed. Choose an expiration month below; each is a real date from our warehouse count.
Abbott's newest FreeStyle Libre sensor. It's small and thin, sends a glucose reading to your phone every minute, and lasts up to 15 days.
- Wear: up to 15 days
- Warm-up: 1 hour
- Readings: every minute, in the FreeStyle Libre 3 app on a compatible phone
- Water: water-resistant, up to 3 feet for 30 minutes
- Ages: 2 and older
- Insulin pumps: can connect to several automated insulin systems, including Omnipod 5 (Libre version) and Tandem pumps
Make sure it's yours: your box says "3 Plus." This is not the original Libre 3 (14-day) or the Libre 2 Plus.
Recall check: Abbott recalled certain Libre 3 and 3 Plus sensors. Every box is checked against Abbott's recall list before it's listed.
What do you pay now?
Compares against the option selected above, at 15 days per sensor. Nothing you type here is saved or sent.
How many do I need?
Uses 15 days per sensor. Delivery: Options and prices for your address show at checkout.
Questions people ask first
What's actually inside the box?
What if I order the wrong version?
Tell us before it ships and we'll swap it at no cost. After it ships, you can return or exchange any sealed, unopened box within 30 days. If the mistake was ours, we cover the return label.
Why is this cheaper than my pharmacy?
These are sealed, unused boxes that people no longer needed, like after a device switch or an over-supply. We buy them from individuals, check every box, and sell below retail cash price. We're an independent reseller, not a pharmacy or an authorized distributor, and we don't bill insurance.
How do I know it's authentic?
Every box is checked for product identity, an intact factory seal, its expiration date, and active recalls, and it's photographed before it ships.
Can I reorder this easily next month?
Yes. Your account keeps your past orders so you can buy the same thing again. No subscription required.
Who is Spare?
Spare is run by Humble Medical Supply in Casa Grande, Arizona. We've spent years in the diabetes supply business, and we started Spare so people paying out of pocket can get sealed supplies at a fair price. Real people answer at (888) 604-0655, Mon–Fri, 9am–5pm ET.