Abstract: The invention relates to a system for unlocking a lock of a space that needs to be secured, in particular an appliance or electrical cabinet (1), in which system, in the locked state of the lock, an electromagnetically drivable bolt (5, 6, 7) can be moved from a state in which it locks the lock to a state in which it releases the lock by applying an electrical voltage, wherein the lock is arranged in the interior of the space and is provided with a code storage device (8) which allows the bolt (5, 6, 7) to be operated only when a code which is stored in the code storage device (8) matches a key code which is wirelessly transmitted from outside the space, via the space wall, to the code storage device (8).