Features:Function - 3 Speed dial keys, 2-9 Number keys Can be customized as function keys; store 500 contacts and 50 call records, unread voice message prompt and so on; 6 system language - Chinese, English, Korean, Portuguese, Français, Español; Supports 3-party audio conference, and members can join at any time.2 SIP Compatibility - Perfect compatible with most platform manufacturers around the world.2.4inch LCD & Clear Keys - Colorful TN screen design provides better User's experience; And large and clear printed buttons are friendly for elderly.Support 4G WIFI & VOIP Work Together - Connect wifi signal without too many wires. When either 4G or VOIP phone is connected, the other party can also make calls.Powerful battery - Built-in 1000mAh lithium battery without having to worry about suddenly running out of power.Specification:Model: P03-4GColor: BlackSIM Card: StandardLCD: 2.4in Color ScreenKeys Quantity: 29WIFI AP: 802.11b/g/n 2.4GUSB: Micro USB InterfaceInput Voltage: 5VBattery: 1000mAh Lithium BatteryPower: 100-240VAntenna: External TNC or Built-in AntennaProduct Size: 20.4 x 10.3 x 6.5cm/8 x 7.2 x 2.6inPackage Size:26 x 23.5 x 7cm/10.2 x 9.3 x 2.7inPackage Weight: 860g/30.3ozPacking List:1 x Handset1 x Telephone Base1 x Coil Cord1 x Antenna1 x Lithium Battery1 x Adapter1 x User Manual