So in the begging of the game claptrap says that they rebranded the “ECHO-2” as a Grenade and I don't think anyone took it seriously but it turns out he was right :
Borderlands 3 - ECHO Device Prop Replica by Chronicle Collectibles - The Toyark - News
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