– 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