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. Item Type: IP Telephone Material: ABS Supported Memory Card: 256G Expandable (Memory Card Not Included) Display: 3.5 Inch 320x480 RJ45 Network Port: 10/100/1000M x 2 RJ11 Telephone Line Interface: Support DTMF, FSK Caller ID Handle Interface: Standard RJ9 PSTN Phone Functions: Hands Free/Controller/DTMF Button/Flash Off/Recording SIP Account: Six Accounts Recording: Supported Poe: IEE 802.3af VLAN: Qos:802.1p/Q tagging(VLAN), Layer 3 ToS DSCP VoIP Parameters: SIP Protocol: SIP 2.0(RFC3261) Transmission Protocol: UDP/TCP/TLS DTMF: Out of Band(RFC 2833) and SIP INFO Audio Coding: G.722/G.729/AMR/AMRWB/GSM/PCMA/PCMU/SPEEX/ILBC/DTMF/ISCWB/OPUS Audio Function: AEC/VAD/CNG/AGC/ANS SRTP: NONE/FORCE/PREFER 3GPP: TS 24.605 Call Transfer: Supported STUN: Supported 1 x IP Telephone 1 x Handset 1 x User Manual 1 x Telephone Wire 1 x Power Cord 1 x Holder