FT-411 MKII OPERATING MANUAL 5Controls & ConnectorsSIDE PANELSÅ LAMP ButtonPress this button to illuminate the display and keypad whennecessary.Ç Monitor (Burst) ButtonIn the USA version, this button opens the squelch momen-tarily without disturbing the setting of the SQL control. Inthe European version, this button activates the 1750 Hz Bursttone generator.É PTT ButtonPress and hold this (Push-to-Talk) button to transmit. TheBUSY/TX indicator glows red while transmitting.Ñ Unlock LeverSlide this mechanical lever upward to release the battery forremoval.ÅÇÉÑ