Technical specification Frequency:200KHz Beam Angle:7 Depth Display:12.1-inch color LCD Output Power:up to 200W Depth Resolution:1cm Accuracy:+/-0.1% of water depth SoundVelocity:1300-1650 m/s Depth Range:0.39-220m Draft:0-9.9m Pulse Length:Automatically selected,with operator override Serial Ports: two RS-232 ports,baud rate 1200-115200 Connection:Printer connection, USB connection(2?) , Keyboard and mouse connection Power Supply:9-18V DC，less than 25W, 110-230 AC(optionally) Operating Conditins: -30-60°C Dimensions:34cm?30cm?15cm Weight:11.5kg