Features: Max & Min measurement Over range display Under range display A & C Weighting FAST & SLOW response Analog AC/DC outputs for connection to frequency analyzer or X-Y shaft recorder Data logger function Adjustable Alarm Levels Back light USB Computer Interface (advanced software for all windows) Standard Accessories: Gift Box with Hard Carrying Casem Manual Battery Screwdriver Audio Plug Windscreen Tripod & DC 9V power supply HTC USB with Software Dimension: 278 X 76 X 50mm For more detail please be free to email us