*VENDOR EOL* Core Features:2 MicroUSB connection Ringer on the base Supports busylightYealink Acoustic Shield TechnologyTeams and Skype for Business compatibleTalking Time up to 14h Dual Wireless range up to 160mTelephone Cable Included Compatible with:Avaya/Poly/Snom/Grandstream/Fanvil/Yealink/Cisco IP Phones