Brand : LIGE Model Number: GT20 Feature: Smart Watch System: Android OS iPhone Function: Heart Rate Tracker Feature: NFC Control Feature: Answer phone Call Feature: Blood Pressure Feature: Blood Oxygen Feature: Music Control Feature: HD Display Feature: Bluetooth Camera Feature: call remind Feature: Bluetooth call Feature: sleep monitoring Function: 24 hour instruction Function: World Time Function: Interactive Music Function: Sleep Tracker Function: Dial Call Function: Call Reminder Case Material: Stainless steel Features : Waterproof Features: 100% Original