Standard Features Waterproof, 5 Inch, Silver Bright Monochrome LCD Display Dual Frequency - 50 and 200 kHz Targets presented in up to 4 gray tones Picture resolution of 240(H) x 320(V) pixels 300 Watt RMS (2400 P-P) output power Seven depth scales, from 0-10 to 0-640 feet Depth offset to 1,500 feet, maximum depth scale of 3,000 feet Automatic or Manual Depth Range and Gain Adjustment A-Scope for rapid fish detection and species identification White Line Mode for enhanced bottom fish detection Audible and Visual, Temp, Speed, Fish or Bottom Alarm TLL output sends position, temp and depth to Furuno TLL capable plotters Multiple Display Modes 1. Normal, Low Frequency/High Frequency 2. Dual Frequency 3. Bottom Lock Expansion 4. Marker Zoom 5. Bottom Zoom 6. A-Scope 7. Two Customizable Navigation Data Display - Displaying digital and analog graphical info, including: Wind Speed/Direction, Ship's Speed, Steering Screens and more Speed and Temperature input via optional sensor or NMEA data   Mini Navigator allows storage of up to 12 waypoints, with capability to navigate back to these points using the LS4100's XTE/Range and Bearing calculation and steering screens Two NMEA0183 ports - one bi-directional and one "listen-only" Includes 525T-BSD B45 style bronze thru hull depth and temp.