The electronic lock STC Dual can be (partly) opened electronically and using a two key system. During normal operation, the lock can be opened remotely with a security signal sent from an operator to the lock. When the security signal is sent to the lock, the lock will open half-way. In this position the handle can be fully unlocked with the key. In case of a power or electronic failure, the lock can be fitted with any regular T-lock cylinder. The bottom lock can be fitted with any regular CAM lock.