O 2" 240 x 320 color screeno 4 SIP Lineso Built-in dual-band Wi-Fi (2.4G/5G)o Support IEEE802.11k/v/r roamingo Support WPA / WPA2-PSK and 802.1X EAP encryption to ensure communications securityo Built-in Bluetooth 5.0 can be used to connect  wireless earphone o No operation screen after 10 seconds during a callo One configurable push-to-talk (PTT) button for quick dialo Up to 9 hours` talk time and up to 200 hours standby time.