- A2DP: Yes
- Noise-cancellation: Yes
- Wideband Audio: Yes
- Digital Signal Processing: Yes
- SoundGuard (Hearing Protection): Yes
- Connects to PC via USB
- Inline answer/end, volume control, and mute
- Improved performance in noisy environment
- 3.5mm connectivity on C3215/C3225
- “Lava” cable and accents