The watch supports network bands:

2G:           B3+B8+B5

3G:           B1+B5+B8

4G_FDD: B1+B3+B5+B8

4G_TDD: B38+B39+B40+B41

GPS Supported . The watch does not work in North America.

SPECIFICATIONS

Brand Name: ERZHOU

Category: Smart Watches

System: Android OS

Function: fitness tracker

RAM: 2GB

SIM Card Available: Yes

Type: On Wrist

Voice assistant built-in: YES

Language: English

Language: Russian

Language: Spanish

Language: POLISH

Language: Portuguese

Language: Italian

Language: FRENCH

Language: german

Language: KOREAN

Language: japanese

Language: Arabic

Network Mode: 4G

Metrics measured: Heart Rate Monitor

Metrics measured: Blood Oxygen Monitor

Metrics measured: Sleep Monitor

Bluetooth-compatible Version: 4.2

GPS: Yes

Multiple Dials: Yes

Battery Capacity: >450mAh

Mechanism: No

Origin: Mainland China

Compatibility: All Compatible

ROM: 16GB

Rear Camera: 0.3MP

Activity Tracked: Other

Activity Tracked: Steps Tracker

Activity Tracked: Activity Tracker

Waterproof Grade: Life Waterproof

CPU Model: SC8541E 4 Core

Band Material: Silica GEL

Touch Screen: YES

Battery Detachable: No

SIM Card Slot: Nano SIM Slot

Wi-fi: YES

Screen Shape: SQUARE

Resolution: 320*385