15Chapter 2. Getting Started the BHT-7000 and System Mode2.3 Components and FunctionsIndicator LEDIlluminates in green when the BHThas successfully read the bar codes.Liquid crystal display(LCD)Shows the charactersand graphic patterns.Trigger switch (M3 key)*Press this switch to startbar-code reading.Optical interface portUsed to exchange data/programswith the host computer via itsintegrated IR port or via the opticalcommunication unit CU-7000. Connector coverInside this cover is the direct-connect interface port.Hand strapBe sure to put your handthrough this strap toprevent you from droppingthe BHT accidentally.Alphanumeric keys**Trigger switch (M4 key)*Press this switch to startbar-code reading.Release buttonPress this button to remove the battery car-tridge.Rechargeable batterycartridge or dry batterycartridgeMain power source of theBHT. Bar-code readingwindow (throughwhich a laser beamwill be emitted)* The tirgger switch function is assigned to both of the M3 and M4 keys by default.** The keypad is available in two types: 32-key pad and 26-key pad.Caution labelRating plate