Sonar phone free app + wireless transducer?

[fishfight]

The best inexpensive wireless fish finder is this model http://www.aliexpress.com/item/FFW-718-P...75521.html ....Cost $79, since I already own 4 fish finder, I am holding off in purchasing a wireless model as of yet.

I sent them an enquiry to find out what exactly is the wireless tech on their transducer.

Wireless can be useful for travelling purposes. wired portable ones cost around $40 from china,

I am always curious how deep, whirlpool, port D, POrt Hope were, after fishing it for so many years.