4G Smart Watch with Sim Card

4G sim card smart watch Specification description

Product

Android Smart Phone Watch

Model

B31

Network

2G/3G/4G

Side key

Power key/SOS

Rotate button

Support, Mechanical encoder

Chipset

Spreadtrum W377E

DDR SDRAM

1GB

Flash EEPROM

4GB

OS

Android 8.1.0

Language

English 

2G Band/Frequency

B2/B3/B5/B8

3G Band/Frequency

B1/B2/B5/B8

4G Band/Frequency

FDD-LTE :B1/B2/B3/B4/B5/B7/B8/B12/B17/B20/B28 TDD-LTE : B38/B39/B40/B41

Size

1.53" 368*448 AMOLED

Battery

850mAh