Over 99% accurate from the day you expect your period (greater than 99% accurate at detecting typical pregnancy hormone levels. Note that hormone levels vary. See insert). Foldable & full-size. Results 5 days sooner (Can be used 5 days sooner than your missed period (4 days before you expect your period). In clinical testing with early pregnancy samples Clearblue gave the following results: Days before the expected period: -1; Pregnancies detected: 98%. Days before the expected period: -2; Pregnancies detected: 97%. Days before the expected period: -3; Pregnancies detected: 88%. Days before the expected period: -4; Pregnancies detected: 56%) with Floodguard Technology. Foldable for easy use and disposal. Extra wide trip changes color for easy sampling. Floodguard Technology to help reduce usage error (Data on file). Clear + or - results. English and Spanish instructions inside. www.clearblue.com. Follow us on: Pinterest. Facebook. Instagram. Clearblue Helpline: Monday-Friday 8:30 am - 5:00 pm Eastern Time. Toll-free. 1-800-321-3279. Please have the product and packaging, including any foil pouches, with you when you call. Calls are recorded for training and quality control. Proud to support (March of Dimes does not endorse specific brands or products) March of Dimes. Fighting for healthy moms and strong babies. Carton made with 100% recycled cardboard.