Buy EPOS | SENNHEISER Training cable:2 x ED to ED open microphone and open speaker on both the trainee and trainer side, with the option to mute button for trainer (ATC 02) - MYITHUB
Sennheiser SC30 USB CTRL ML Wideband Monaural USB Headset, NC (504546)
EPOS | Sennheiser Leatherette ear pads, small for SH 310 + 320 + 330 + 333 + 335 + 340 and CC 510 + 513 + 520 + 530 | AusPCMarket
CC 500 Serie / SH 300 Serie | cmp-net.com
Sennheiser Headset CC 510 einseitig online kaufen | eBay
Sennheiser CC 510 with CSTD 01 Bottom Cable | Onedirect.co.uk
EPOS | Sennheiser Acoustic Foam ear pads, medium for CC 540 + SH 350 | AusPCMarket