Abstract: An audio jack coupled light-emitting device comprising a body comprising a front portion and a rear portion, the front portion comprises a first opening, the rear portion comprises a second opening, a power source located inside the body comprising one or more lithium ion batteries, a circuit board comprising a front and a rear surface located inside the body, a light-emitting element coupled to the front surface of the circuit board, an optical lens inside the first opening and in front of the light-emitting element, an audio plug, a dimmer switch coupled to the rear surface of the circuit board and the light-emitting element, a push button for turning the light-emitting element on and off, a push button cover for triggering the push button, and a timer for turning the light-emitting element off after a predetermined amount of time.