Abstract: An electronic lock for locking or unlocking a door of a safe is provided with a housing mounted on the door; an axis-shaped coder disposed in the housing; a dial mounted on the coder; a plurality of LEDs disposed in the housing; an electromechanical solenoid disposed in the housing; a latch bolt operatively connected to the electromechanical solenoid; a fastening unit disposed in the housing and including a clamping element put on the latch bolt; a pin tumbler lock secured to the housing and including a keyhole and a lever; a microcontroller disposed in the housing for controlling the coder, the electromechanical solenoid, and the LEDs; and a battery disposed in the housing for supplying electricity to the coder, the microcontroller, the electromechanical solenoid, and the LEDs.