1.floating wing nut.
2.find fish. period.
3. 9 Meter cable with sonar sensor.
4. great for ametures

  Simulation mode

  ·   Depth readings from 2.0 to 328ft（0.6-100meters) in 1/10th precision

  ·   User selectable feet or meter readings

  ·   Hi/Low sensitivity setting

  ·   Battery save mode

  ·   Green LED backlight

  ·   Audible fish alarm

  ·   Fish depth scale

  ·  200KHz Sonar Frequency

  ·  45-degree sonar beam angle

  ·  4 "AAA" Batteries

  ·  Transducer: Side Hull Transform Mount or Float