Modest Design, Easy-to-Use User Interface，Built-in Battery, Wi-Fi and DECT to Minimize Deployment Costs，HD Audio, Smooth Communication，Rich Features and High Expandability

4-inch multi-touch screen with 480x800 resolution • Optimal HD audio, full duplex technology • Yealink Noise Proof Technology • Built-in rechargeable lithium battery • Up to 15 hours talk time (in ideal conditions) • Up to 75 hours standby time in Wi-Fi mode (in ideal conditions) • 20-foot (6-meter) and 360° voice pickup • Built-in 6-microphone array for voice pickup • 5-way conference call • Hybrid UC meeting • Built-in Wi-Fi (2.4GHz/5GHz, 802.11a/b/g/n) • Built-in Bluetooth 4.2