The Pressed Steel Class 121 single car DMU 'Bubble car' will feature:
- 5 pole skew motor
- Close coupling mechanism
- NEM coupling pockets
- DCC21/22 pin compatability (22-21 pin conversion board)
- Independent cab lighting
- Independent saloon lighting
- Directional lighting
- Headcode lighting
- Rotating & lit headcode panels (where applicable) with different destinations
- DCC sound compatability
- Fully modelled cab and saloon interior
- Darkened profile RP25.100 wheels with 14.4mm back-to-backs
- 2 digit reporting panels (where applicable)
- Original 'joined' exhausts (where applicable)