Detailed Product Description FEATURE:1) Dual-frequency: 50 and 200 KHz2) 5.6-inch TFT LCD display with 8-color or multi ... is selectable from blue, light blue, white and black.(3) Basic RangeMeters: 5/10/20/40/80/150/200 ... , 150fathoms, 200 passi/braza)(5) Zoom RangeTimes 2, 3, 4 and 5 ranges(6) Bottom Lock Expansion Range5/10meters ... , 0.2, 0.2, 0.4, 0.8, 1.5, 3.0TX Rate(pulse/min) 600, 600, 600, 375, 187 ...