Similar to its other PiranhaMax monochrome brothers, the Hummingbird Fish Finder PiranhaMax 170 is also a fishfinding oriented device, really cheap unit, with a price under $100.
The unit’s electronic head device, is similar to the PiranahMax 150 and 160, but this one has better wattage. It goes up to 1600 Watts (PTP) which gives it a better depth penetration. This unit is quite reliable for fishing in waters up 800 feet deep.
Also, this unit has a better screen resolution, 240 x 160 pixels