Feature 1:Android 8.1 operating system
Feature 2:Hd dual camera camera 500W
Feature 3:Quad-core CPU
Feature 4:Heart rate measurement
Feature 5:WIFI wireless fast internet access
Feature 6:Bluetooth 4.2
Feature 7:2.06 inch AMOLED HD square screen,

Home screen resolution:410*502
Feature 8:Step counting, multi-motion mode
Feature 9(Implantation ):Facebook, Messenger, LINE, BING, PayPal, Gmail, Whatsapp, twitter, nstagram, Telegram, Chrome, outlook.com, Yahoo Mail and other applications.

Basic parameter:
Network type: single SIM card
Network mode: GSM/WCDMA/LTE
Supported frequency bands:

2G:B2+B3+B5+B8

3G:B1+B2+B5+B8

4G:(FDD B1/B2/B3/B4/B5/B7/B8/B12/B17/B20/B28F/B66,TDD B34/B38/B39/B40/B41)

Hardware parameters:

Operating system: based on Android OS v8.1
Number of cores: four cores
CPU model:SL8541E
Memory: 3GG+3G
SIM card type: SIM card (small card Nano SIM card)
Battery type: built-in battery
Battery capacity: 930mAh
Input method: handwriting
Call history: received + dialed + missed calls
Contacts: business card storage
basic function:Text message (SMS), recording function, alarm clock function, timer, stopwatch, real-time weather, calendar function, WIFI, Bluetooth, photo camera, music video playback, GPS navigation, etc.

About activity tracking accuracy: