The Yealink T41S is a feature-rich business tool for superior communications and extended functionality.  The SIP-T41S is a six-line IP phone that comes with built-in programmable keys to enhance productivity. 
Yealink T41S Key Features
Up to 6 SIP accounts
2.7" 192x64-pixel graphical LCD with backlight
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
With an all-new USB port, the SIP-T41S 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. The SIP-T41S features Yealink Optima HD Voice technology and wideband codec of Opus delivers superb audio quality and crystal clear voice communications. The T41S offers a faster, more-responsive interface than the T41P and several performance-enhancing functions.