Brand: ZeblazeModel: GTS 4Vibrant 1.94-inch Amoled Display8.7MM Ultra-Slim Watch CaseHealth & Fitness Tracking300mAH Battery (3days Backup in Heavy Use)Bluetooth version: BLE5.3Operating mode: Full TouchAPP name: FitCloudProSmartphone compatibility: Android 5.0, iOS 10.0 and above