These are all the Echo Devices we've seen across the Borderlands games so far. Weird to think that before BL3 those others were also canonically responsible for projecting your menu. 3 actually
I got the echo-2 : r/borderlands3
ECHO-2 Grenade Mod Weapon Showcase UNIQUE White Rarity Grenade drop from BOSSES! - YouTube
The echo 2 is a grenade mod in borderlands 3, I got it from the eridium slot machine as a jackpot : r/borderlands3
BL3] So this is a thing, apparently : r/Borderlands
AN ANOINTED ECHO 2 FINALLY DROPPED!!! : r/borderlands3
Borderlands 3 - The Search For The Elusive Echo-2 Grenade Mod (Stream Highlights) - YouTube
ECHO-2 Grenade Mod Weapon Showcase UNIQUE White Rarity Grenade drop from BOSSES! - YouTube
Borderlands 3 - ECHO-2 Mythbusting - YouTube
FL4K's Echo Log from the Commander Lilith and the Fight for Sanctuary » MentalMars