PanOptix is the $600 - $900+ TR 21 (Discontinued) TR22 - TR30 Transducer for most of the EchoMap and GPSMap Displays - Start at $699 for the 7" Chirp CX-SX models and looks like 3-5 color pixels blobs, cool yeah until you see the latest LiveScope version.
LiveScope will NOT work on the EchoMap series unless it's the PLUS version so $899.00 and above...
PanOptix Livescan the ultimate High Def "Live Forward and Down - some realignment 3 clicks of the transducer on the T-Motor Shaft required if you just focus on down is $1,499.00
https://buy.garmin.com/en-US/US/p/591379 There's a reason so many are for sale everyone is upgrading to the latest it's sooo addicting.
No affiliation, I've just spent the last 2 months searching and researching options so i don't buy something that's end of life.
Hope this helps...
D.C.