Sennheiser M3 True Wireless 3 White (509181) is a fully wireless in-ear headphone designed for everyday use, travel, and active lifestyles. Its adaptive hybrid noise-canceling system automatically adjusts to ambient noise levels for an immersive listening experience. A four-microphone system analyzes surroundings in real time for improved call clarity and noise control.

TrueResponse dynamic drivers deliver detailed and balanced sound across a 5 Hz – 21 kHz frequency range. It supports aptX Adaptive, aptX, and AAC for high-quality wireless audio. Transparency Mode allows awareness of surroundings.

It offers up to 7 hours of playback plus 21 additional hours via the charging case, with Qi wireless and USB-C charging support. IPX4 water resistance makes it suitable for daily and sports use. The Smart Control app enables EQ customization and Sound Personalization. Touch controls and auto-pause enhance usability.