"Yealink Ruggedized DECT Handset • Ruggedized DECT handset with IP54 protection rating • Scratch resistant, disinfectant resistant • 1.8’’ 128x160 TFT color screen with intuitive user interface • HD voice and FNR (Flexible Noise Reduction) • Vibration alarm •Up to 40 hours of talk time •Up to 575 hours of standby time • Keypad backlight and keypad lock • Fully compatible with Yealink W80/W90 Multi-Cell System for seamless roaming and handover with PSU"