Clearblue Digital Ovulation Test - Fertility Test Sticks - 10 Tests - CBOBASE
Clearblue Digital Ovulation Test Kit (OPK) - 1 Digital Holder & 10 Tests - CBOBASE. The Clearblue Digital ‘smiley face’ is the indication you are looking for. Over 99 percent accurate at detecting the luteinising hormone (LH) surge.