The resonator cage on the Fourteenth Doctor's sonic screwdriver. (WC: The Fourteenth Doctor's Sonic Screwdriver, PROSE: Super Sonic)
The resonator cage was a part of the Fourteenth Doctor's sonic screwdriver located below the coral handle. This part resembled a section of the Eleventh Doctor's sonic screwdriver. (PROSE: Super Sonic [+]Paul Lang, Doctor Who The Official Annual 2024 (Penguin Group, 2023). Pages 36-37.)
