1、2.4 inch Color Screen: 4G VOIP phone adopts 2.4 inch color screen design, intelligent and more friendly user interface. Quad core A53, creating a smoother operating experience. 2、3 Party Sound Conference: 4G VOIP dual mode fixed telephone supports 3 party sound conference, you can add members to join at any time, talk is more convenient. 3、Easy to Use: Desk phone has 3 groups of speed dialing, 8 customizable programmable function keys to set up frequently used numbers, one key call out, convenient for office and elderly use. 4、High Definition Calling: Desk phone supports for Volte HD calling, no need to have a microphone close to your ear to enjoy high definition sound quality. One key hands free call, release your hands, chat freely, as you like. 5、WiFi Function: Office telephone with WiFi function, you can quickly and easily find the WiFi signal. Detailed incoming and outgoing call records, convenient for you to check at any time. Item Type: 4G VOIP Dual Mode Fixed Telephone Material: ABS, LCD LCD Display: 2.4 inch Color Screen Support: 1 Standard SIM Card (Not Included) Polymer Lithium Battery: 1000mAh (Shipped With Matching Battery) Network: 4G (This is the European Version) European Version of The Band (Consult The Local Operator to Support The Service): B2 B3 B5 B8 (2G); B1 B5 B8 (3G); B1 B3 B5 B7 B8 B20 B38 B40 B41 (4G) WIFI: IEE802.11b g n Support Chipset Platform: for Spreadtrum 9820e Sound Functions: G.722 G.729 AMR AMRWB GSM PCMA PCMU SPEEX ILB DTMF ISACWB.  Supports Superior Sound Calls; VAD CNG AGC ANS AEC DTMF: RFC 2833 SIP INFO SIP Protocol: SIP 2.0 (RFC3261) Support: 2 Way SIP Account Support: SIP UDP TCP TLS Network Protocol: HTTP TR069 RTP SRTP Phone Features: Add and Remove Contacts; Missed Call Alert; Do Not Disturb; Auto Answer; Call Forwarding; Busy Forwarding; Unconditional Forwarding 1 x Telephone 1 x Telephone Handle 1 x Signal Stick 1 x Instruction Manual 1 x Telephone Line (European Version) 1 x Adapter 1 x Charging Cable 1 x Matching Battery