... , Fishing Net, Dual-frequency: 50 and 200 KHz, 5.6-inch TFT display with 8-color presentation FEATURE:1) Dual-frequency: 50 and ... . General(1) Display5.6inch TFT LCD(2) Echo Color8 colors (including background color) according to echo intensity. Monochrome display is also available. The ... , 10, 20, 40, 80, 150, 300Pulse-Length(ms) 0.2, 0.2, 0.2, 0.4, 0.8, 1.5, 3.0TX Rate ...