The Yealink T42S IP phone is a dynamic business communications tool for superior voice communications and extended functionality. 

Yealink T42S Key Features
Up to 12 SIP accounts
2.7" 192x64-pixel graphical LCD with backlight
Dual-port Gigabit Ethernet
Opus* codec support
USB 2.0
T4S Auto-P template unified
T4S firmware unified
PoE support
Paperless label design
Headset, EHS support
Integrated stand with 2 adjustable angles
Wall mountable
The SIP-T42S is a 12-line IP phone with multiple programmable keys for enhancing productivity. It features Yealink Optima HD Voice Technology and wideband codec of Opus for superb sound quality and crystal clear communications.

The T42S has a faster, more responsive interface than the T42G and offers better overall performance. 

The SIP-T42S is built with Gigabit Ethernet technology for rapid call handling. Plus, with an all-new USB port, the SIP-T42S boasts unparalleled functionality and expansibility, which comes ready for future Bluetooth, Wi-Fi and USB recording features.
The new T4S series offers the same elegant appearance of the T4 line, but with improvements for greater interoperability and collaboration.