The 4SURE Smart Duo is a dual-function glucose and β-ketone monitoring system designed for people with Type 1 diabetes. It delivers fast, highly accurate results using GDH-FAD and dedicated ketone reagents. Bluetooth connectivity enables seamless data transfer for improved tracking. The meter exceeds EN ISO 15197:2015 accuracy standards and minimizes hematocrit interference. User-friendly features include a backlit display, strip-port light, pre- and post-meal markers, and automatic quality control detection. Its long strip shelf life ensures reliable performance. Available in the UK and Germany, it offers a dependable and convenient solution for daily diabetes management.