There is provided a light emitting device which includes a light emitting element having a main emission peak in the wavelength region of greater than 420 nm and equal to or less than 500 nm, and a phosphor layer formed on the light emitting element. The first plate has a first distal end, the second plate has a second distal end and the third plate has a third distal end and a fourth distal end. The device includes guiding means configured to lead particles, which is detached during a machining process, the inner space of the container via the inlet opening and the inner space comprises a first material that has a consistency such that it has the ability to receive and retain detached particles, which are led into the inner space during the machining process. The tension adjustments are conveniently made through an existing opening in the top slide. A method includes providing a gear selector having an integral variable display, selecting a message from a message set, transmitting the message to the variable display, and displaying the message.