PSB's RoomFeel™ technology emulates the experience of listening to high-quality speakers in a well-designed room, creating a natural sound. This technology incorporates research on 'Room Gain,' which accounts for the warmth and energy that room boundaries add to a speaker's response curve. RoomFeel minimizes the 'in your head' sensation, offering an open, in-room listening experience with the M4U TWM, ensuring a non-fatiguing and natural sound whether you're on the go or at the gym.

These earbuds feature convenient click buttons for volume control, track skipping, and calls. The smart charging case offers wired USB-C and wireless charging options, providing 8 hours of playback and 24 hours of backup power. Included are three sizes of silicon tips for noise isolation and secure fit. With an IP65 rating, they are sweatproof, water-resistant, and dustproof, perfect for active lifestyles. The PSB Headphones App enhances control with sound settings, Audiodo profiles, noise transparency levels, EQ presets, and battery monitoring.