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 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. Package List: 1 x IP Telephone1 x Handset1 x User Manual1 x Telephone Wire1 x Power Cord1 x Holder