Core Features: Seamless handover and roaming Up to 250 parallel calls / 60 bases / 250 handsets / 250 SIP accounts Support LDAP / Remote Phonebook / Xsi Directory External antennas Coverage up to 50m indoors and 300m outdoors CAT-iq 2.0 DECT / Opus Codec Compatible with Yealink W59R/W56H/W53H/CP930W/DD PoE (no PSU included) DECT Manger: for use with W90B