Marine Electronics
Vexilar SP200 Wi-Fi Fishfinder with High Speed Transducer - Black
Usage: permanent boat installation with 12 Volt battery required 400 watts peak-to-peak high speed skimmer style transducer - max depth: 240 Ft/Sonar frequency: 200/83 dual beam 20/40 degree Power source: 12 Volt power source required (not supplied)...
https://www.bizrate.co.uk/marineelectronics/vexilar-sp200-wi-fi-fishfinder-with-oid6662198151.html