With the ClexFWProg App, the firmware of the electronic locking units of Uhlmann & Zacher can be updated using the smartphone. During the updating process, the smartphone communicates with the locking units via Bluetooth® Low Energy. Make sure you have the latest firmware features and security fixes by keeping the locking units up to date. Other features: - Service openings - Battery position for battery change - Disassembly position - Toggle locks - Setting real time clock