User Friendly Wireless • Transmission • High Expandability • Efficient Installation and Provisioning

•Enjoy Wireless Freedom •A Better User Experience with Android 9.0 System •HD Audio and HD Video •Improved Security Performance

• 3.7" 360x160-pixel graphical LCD with backlight • Adjustable LCD screen • Dual firmware images • T53/T53W/T54W/T57W firmware unified • Built-in Bluetooth 4.2 • Built-in dual band 2.4G/5G Wi-Fi (802.11a/b/g/n) • USB 2.0 port for USB recording, wired/wireless USB headsets and EXP50 • Up to 12 VoIP accounts • Dual-port Gigabit Ethernet • PoE support • HAC Handset • Paperless label design • Wall mountable

• Runs Android 9.0 • 7 inch (1024 x 600) capacitive adjustable touch screen • Supports Yealink Bluetooth Handset BTH58 • 720p30 HD video • Optimal HD audio, Yealink Noise Proof Technology • Yealink’s SDK (Software Development Kit) • DoorPhone Features (Preview, One-button Open, Monitoring) • Built-in Bluetooth 4.2 and Dual Band 2.4G/5G Wi-Fi • 2 x USB 2.0 ports for USB headset, media and storage applications • Up to 16 SIP accounts • Up to 3-party video conferencing • Up to 10-party video/audio mixed conferencing (up to 2 video calls) • Dual-port Gigabit Ethernet, supports PoE • Wall mountable • Supports up to 3 Expansion Module EXP50 • Supports Yealink/Unify Square Device Management Platform