Specifications: Fish finder 615001 is a very helpful tool for fishing based on ultrawave technology, it help to locate the fishes and the distance and direction beteen the fisher and fishes. Maxium down probing depth:90m/300ft Maxium side probing depth:36m/120ft Output frequency:450khz Output watt of ultrawave:0.72w (max) Display of screen:128x64 Size of screen:80mmx60mm Power supply: External power 12 dc Length of sensor cable:6m Angle of seosor:6 degree Working temperature: -20 degree ~ 80 degree Size of unit:4.7cm(h)x13.8cm(w)x15cm(l) Weight of unit:600g Certificate: Ce