Yealink W56H Wireless SIP DECT Telephone
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W56H VoIP SIP DECT handset, 2.4 inch colour TFT LCD, HD audio, 3.5mm headset jack, lithium battery, for use with SKU #W60B, SKU #W53P, SKU #W60P or SKU #W80B. TECHNICAL NOTE: The W56H handset requires firmware V81 or newer in order to pair and work with SKU #W60B, SKU #W53P or SKU #W60P. The W56H handset requires firmware version 18.104.22.168.rom or newer in order to pair and work with the W80DM base station in a multi-cell environment.