If you're passionate about computers and electronics, if you're on the cutting edge of technology and no detail escapes you, buy Fitbit Versa 4 Smartwatch Black at the best price. Color: BlackFeatures: Sleep MonitorBuilt-in microphone: YesAlarm: YesFM radio: NoGlonass: YesNo includes: Wi-FiAccelerometer: YesCompatible: iOSAndroidiOS, AndroidConnectivity: BluetoothGPSNFCCharacteristics: TouchscreenWater resistantBracelet color: BlackDial color: BlackGenre: UnisexWatch type: SmartwatchProduct plug-in: YesSocket type: EUType of closure: BuckleApprox. battery life.6 hours140 hoursApprox. charging time: 2 hours