The Yealink W57R DECT Ruggedised Handset is a wireless IP54-rated phone for dusty, damp and tough environments. combining wireless communication with the benefits of VoIP into a high-quality audio experience. Compatible with W80/W90 multi-cell systems and W70B single-cell, With vibration alert, Withstands drops from up to 3.5 m Suitable for offices, warehouses and open-air sites, Proven Yealink HD audio