Yealink T54S IP Desk Phone (T54S) 

T54S VoIP SIP telephone, 2 x Gigabit Ethernet, PoE required, AC optional, 4.3 inch colour TFT backlit LCD, HD audio including Opus codec support, RJ9 headset jack, EHS support for specific Jabra and specific Plantronics headsets via USB, 1 x USB port, Bluetooth 2.0, add up to 3 expansion modules (sidecar / attendant console), SKU #EXP50, optional Wi-Fi, SKU #WF40. Optional AC power supply, SKU #PS5V20000US.

** DOES NOT COME WITH POWER SUPPLY **

https://www.deploydepot.ca/yealink-power-supply-ps5v2000us-for-t46-t48-t52-t54-t56-t57-t58/