Some of the Custom Oticon Own hearing aids are too small to include a wireless radio and even the bigger Custom Oticon Own hearing aids cannot include a wireless radio if you choose to include a Telecoil for the custom build. So it’s best to look at the specific build specifications.
2022-Q3 - Own Custom IIC 10 without 2.4 GHz*
2022-Q3 - Own Custom CIC 10 without 2.4 GHz*
2022-Q3 - Own Custom ITC 312*
2022-Q3 - Own Custom ITE-HS 312*
2022-Q3 - Own Custom ITE-FS 312i*
(*) = Too small or not possible to combine 2.4 GHz and Telecoil, Choice of Telecoil = no wireless
ETA: Here’s a picture showing with or without 2.4 GHz wireless. Though, it may further confuse things because the build choice of adding a Telecoil eliminates 2.4 GHz wireless.