Yealink W69P, certified to the rigorous IP67 standard, is a professional ruggedized DECT handset with built-in Bluetooth that is durable in dusty, humid, and harsh environments. As a rugged and durable handset, W69P has also been developed with Yealink optimal HD audio quality that combines multiple leading technologies together, including FNR (Flexible Noise Reduction), LC3 (Low Complexity Communication Codec) Plus, full duplex, and Opus. This means users can get a stable and high-quality audio experience even if the location is noisy or has wireless interference.