Key features

• User-replaceable 
• Can easily be removed using quick-release lever or can be securely locked down using optional locking screw (FZ-VSW551U includes set of 14 screws)
• N6703HD barcode imager - 1D/2D capable;  3x faster and brighter
•  Includes trigger button w/adjustable settings -- by default laser stays on for 8 seconds or until a barcode is scanned for easy one-handed operation
• Fits into Left Expansion Area;  Only compatible on mk3