No brand is more accurate. Only test with smart countdown. Results 5 days sooner (Clearblue can be used to test up to 4 days before you expect your period (5 days sooner than the missed period). In clinical testing with early pregnancy samples Clearblue gave the following results: Number of Days Before the Expected Period: -1; Percent of Samples from Pregnant Women Giving a Pregnant Result: Greater than 99%; Number of Days Before the Expected Period: -2; Percent of Samples from Pregnant Women Giving a Pregnant Result: 98%; Number of Days Before the Expected Period: -3; Percent of Samples from Pregnant Women Giving a Pregnant Result: 95%; Number of Days Before the Expected Period: -4; Percent of Samples from Pregnant Women Giving a Pregnant Result: 75%). 1. Easy: Simply hold the tip in your urine stream for 5 seconds. The smart countdown appears on the display and counts down to your result. 2. Accurate: Over 99% accurate from the day of your expected period (99% accurate at detecting typical pregnancy hormone levels. Note that hormone levels may vary. See insert). 3. Testing Early: Clearblue can be used to test up to 4 days before you expect your period (5 days sooner than the missed period). In clinical testing with early pregnancy samples Clearblue gave the following results: Number of Days Before the Expected Period: -1; Percent of Samples from Pregnant Women Giving a Pregnant Result: Greater than 99%; Number of Days Before the Expected Period: -2; Percent of Samples from Pregnant Women Giving a Pregnant Result: 98%; Number of Days Before the Expected Period: -3; Percent of Samples from Pregnant Women Giving a Pregnant Result: 95%; Number of Days Before the Expected Period: -4; Percent of Samples from Pregnant Women Giving a Pregnant Result: 75%. English and Spanish instructions inside. Contents: 2 test sticks and 1 English/Spanish insert. www.clearblue.com. Follow us on: Facebook. 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.