Connected watch - Universal - Smartwatch 40mm Smartwatch Series 61.57ch Full Screen Bluetooth Called Music Smartwatch Bracelet IOS | Smartwatches (Black) Highlights Universal Smartwatch 40mm Smartwatch Series 61.57ch Full Screen Bluetooth Called Music Smartwatch Bracelet IOS | Smartwatches (Black) Smart Watch 40mm SmartWatch Series 6 1.57inch Full Screen Bluetooth Call Music Wristband Smart Bracelet for Android iOS | Smart Watches (Black) Features System requirements: Android5.0+/iOS10.0+ Master Chip: HS6621 Wristband memory: 64m Bluetooth for calls: AB5376A2 Bluetooth version: 5.2 Heart rate chip: SC7R30 Screen display: 1, 57inch-Square Screen-320*320-TFT Battery capacity: 200mAh Using time about 10 days Button method: Touch Full screen Motor: Pie motor Charging port: Magnetic charging Waterproof level: IP67 Sensor: G-Sensor 3 Axis Local dial: 4 black color