Feature:1. 3.5in Color Screen: This IP telephone is designed with a color screen of 3.5 Inches, intelligent and user friendly UI, providing smoothing operating experience.2. Programmable Keys: This VoIP phone is equipped with 3 buttons for speed dial. 8 programmable buttons allow you to set commonly dialed phone numbers.3. 2.4G/5G WiFi Supported: This HD IP phone supports 2.4G/5G WiFi connection. Designed with 10/100/1000M RJ45 ports and RJ11 telephone wire ports.4. 3 Party Audio Conference: This business office phone supports 3 party audio conference, and members can be added anytime you want, offering great convenience.5. HD Phone Call: This corded phone supports Volte HD call, thus you don't have to hold the handset very close to the ear. Hands free call and call records functions are supported.Specification:Item Type: IP TelephoneMaterial: ABSSupported Memory Card: 256G Expandable (Memory Card Not Included)Display: 3.5 Inch 320x480RJ45 Network Port: 10/100/1000M x 2RJ11 Telephone Line Interface: Support DTMF, FSK Caller IDHandle Interface: Standard RJ9PSTN Phone Functions: Hands Free/Controller/DTMF Button/Flash Off/RecordingSIP Account: Six AccountsRecording: SupportedPoe: IEE 802.3afVLAN: Qos:802.1p/Q tagging(VLAN), Layer 3 ToS DSCPVoIP Parameters:SIP Protocol: SIP 2.0(RFC3261)Transmission Protocol: UDP/TCP/TLSDTMF: Out of Band(RFC 2833) and SIP INFOAudio Coding: G.722/G.729/AMR/AMRWB/GSM/PCMA/PCMU/SPEEX/ILBC/DTMF/ISCWB/OPUSAudio Function: AEC/VAD/CNG/AGC/ANSSRTP: NONE/FORCE/PREFER3GPP: TS 24.605Call Transfer: SupportedSTUN: Supported.Package List:1 xIP Telephone1 x Handset1 x User Manual1 x Telephone Wire1 x Power Cord1 x Holder