Item Type: 4G VOIP Dual Mode Fixed Telephone Material: ABS, LCD LCD Screen: 2.4 inch color screen European Voltage: 100-240V Support: 1 Standard SIM Card (Not Included) Polymer Lithium Battery: 1000mAh (Comes 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 Audio Features: G.722 G.729 AMR AMRWB GSM PCMA PCMU SPEEX ILB DTMF ISACWB. Supports Calls with Superior Sound; 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 Transfer; Busy Forwarding; Unconditional Forwarding 1、2.4 inch Color Screen: The 4G VOIP phone features a 2.4 inch color screen design, with an intelligent and user-friendly interface. Quad-core A53, creating a smoother user experience. 2、3-Party Audio Conference: The 4G VOIP dual mode fixed telephone supports 3-party audio conferencing, allowing you to add members to join at any time, making calls more convenient. 3、Easy to Use: The desk phone has 3 groups of speed dial, 8 customizable programmable function buttons to set frequently used numbers, one-button dialing, convenient for office and elderly use. 4、High-Definition Call: The desk phone supports Volte HD calls, so you don't need to hold a microphone close to your ear to enjoy high-definition sound quality. One-button hands-free calling, freeing your hands, chat freely, as you wish. 5、WiFi Function: Office phone with WiFi function, you can quickly and easily find the WiFi signal. Detailed records of incoming and outgoing calls, convenient for you to check at any time. 1 x Phone 1 x Phone Handle 1 x Signal Pin 1 x User Manual 1 x Phone Line (European Version) 1 x Adapter 1 x Charging Cable 1 x Matching Battery European frequency bands (consult local operators to support the service) : B2, B3, B5, B8(2G); B1, B5, B8(3G); B1, B3, B5, B7, B8, B20 and B38, B40, B41 (4G), and to use them.