Grandstream WP822, WiFI Phone, 2 SIP, 2.4 inch (240x320) TFT color LCD, Rechargeable 2000mAh battery, 8 hour

Protocol/standards SIP RFC3261, TCP/IP/UDP, RTP/RTCP, HTTP/HTTPS, ARP, ICMP, DNS (record, SRV, NAPTR), DHCP, SSH, TFTP, NTP, STUN, SIMPLE, 802.1x, TLS, SRTP, IPv6 Voice codecs and features Support G.711µ/A, G.729A/B, G.722 (Broadband), iLBC, Opus, In-band and out-of-band DTMF (in audio, RFC2833, SIP INFO), VAD, CNG, AEC, PLC, AJB, AGC, ANS Wi-Fi Yes, built-in dual-band Wi-Fi 802.11 a/b/g/n/ac (2.4GHz and 5 GHz). 802.11k/r/v Supported (WPA2/WPA2-Enterprise). Wi-Fi encryption WEP, WPA/WPA2, WPA Enterprise, WPA3, WPA3-Enterprise Graphic color TFT LCD display with a diagonal of 2.4 inches (240x320 pixels) Bluetooth Yes, built-in Peripheral devices 3 soft keys, dial, hang up, speakerphone, phonebook, backlit keyboard, proximity sensor, vibration motor, volume button, navigation keys and accelerometer support for customizable gestures Customizable button for "push and talk" mode Auxiliary ports 3.5mm Headset Jack, Micro USB Charging Port, Dual Microphone, Two-color MWI indicator Telephony Hold, transfer, forwarding, three-way audio conference, call waiting, call log (up to 100 entries), downloadable phonebook (XML, up to 500 entries), automatic dialing when the handset is lifted, automatic response, flexible dialing plan, personalized music ringtones, server backup and emergency switching, "push and talk", LDAP Safety User and administrator level passwords, MD5 and MD5-sess authentication, 256-bit secure configuration file based on AES, SRTP, TLS, access control to the 802.1x transmission medium. HD Audio Yes, both on the handset and on the speakerphone with broadband audio support, HAC is supported 802.11e Quality of Service (WMM) and Level 3 quality of service (ToS, DiffServ, MPLS) Multilingual English, Chinese, German, French, Italian, Portuguese, Russian, Spanish and other languages. Update/Initialization Firmware update via TFTP/HTTP/HTTPS/FTP/FTPS, mass initialization using an encrypted XML configuration file, manual download Power and green energy efficiency Universal Power adapter included Input: 100-240 VAC; Output: +5V DC, 1 A (5 W) Lithium-ion battery 2000 mA, standby time 200 hours and talk time 8 hours Size Tube dimensions: 164.0 x 52.0 x 25.8 mm. Dimensions of the charger stand: 77.9 x 81.2 x 38.2 mm. Tube weight: 185.90 g. Tube package weight (not including QIG): 422.60 g. Temperature and humidity. Operating temperature: 0°C to 45°C; Operating humidity: 10-90% (non-condensing). Storage temperature: -20°C to 60°C; Storage humidity: 10-90% (non-condensing). Compliance with FCC, CE, RCM, IC, UKCA