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, Franais, Espaol; 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: P03-4G Color: Black SIM Card: Standard LCD: 2.4in Color Screen Keys Quantity: 29 WIFI AP: 802.11b/g/n 2.4G USB: Micro USB Interface Input Voltage: 5V Battery: 1000mAh Lithium Battery Power: 100-240V Antenna: External TNC or Built-in Antenna Product Size: 20.4 x 10.3 x 6.5cm/8 x 7.2 x 2.6in Package Size:26 x 23.5 x 7cm/10.2 x 9.3 x 2.7in Package Weight: 860g/30.3oz Packing List: 1 x Handset 1 x Telephone Base 1 x Coil Cord 1 x Antenna 1 x Lithium Battery 1 x Adapter 1 x User Manual