Offering depth, speed, and temperature in one small package, take the guess work out of boating. Just follow your device paired with this transducer, and know you will be in the right place. Provides depth, speed and temperature in one package 8-pin 600 W transducer Depth of 800 to 1,200 ft Operating frequency of 50 to 200 kHz Beamwidth of 45 to 11 degrees Mounts on a 2 to 20 degree transom Transducer kit comes with installation instructions (PLEASE follow the instructions carefully to avoid damaging your boat) Compatible With: echo(TM) 101 echo(TM) 151 echo(TM) 151dv echo(TM) 201 echo(TM) 201dv echo(TM) 301c echo(TM) 301dv echo(TM) 501c echo(TM) 551c echo(TM) 551dv echoMAP(TM) 50dv echoMAP(TM) 50s echoMAP(TM) 70dv echoMAP(TM) 70s GPSMAPA(R) 1020xs GPSMAPA(R) 1040xs GPSMAPA(R) 421s GPSMAPA(R) 441s GPSMAPA(R) 521s GPSMAPA(R) 527xs GPSMAPA(R) 546s GPSMAPA(R) 547xs GPSMAPA(R) 720s GPSMAPA(R) 721xs GPSMAPA(R) 740s GPSMAPA(R) 741xs GPSMAPA(R) 820xs GPSMAPA(R) 840xs GSD(TM) 22 Digital Remote Sounder GSD(TM) 24 Digital Remote Sounder