The Apple Watch Series 6 models look almost identical to the Apple Watch Series 5 that they replace, but they have a faster architecture, and add an "always-on" altimeter and a blood oxygen sensor (Spo2). They also offer a variety of new surfaces and watch strap options. This model, the Apple watch series 6 (aluminium, GPS, 40 mm) no wireless cellular capability, but high-end model of the series is also able to connect to the Internet without "tethered" iPhone for some functions. This GPS model is required to connect an iPhone 6S or later iOS 14 or higher. All Apple Watch Series 6 devices are controlled with a digital crown with haptic feedback and a touch-enabled display. This special Apple Watch Series 6, the GPS model in the 40 mm size, has a 324 x 394 ltpo OLED screen with ion-x glass in an aluminium case packed with a ceramic and sapphire glass base that connects to the charger. The battery life is a Apple estimated "up to 18 hours" in total, but in particular "up to 1.5 hours" talk time connected to an iPhone (or LTE for LTE enabled models), "up to 11 hours" of audio playback from Apple watch storage, 'up to 11 hours' working indoors and 'up to 7 hours' elaboration in Free with gps. There are five aluminium options available from Apple specialist retailers - blue with a deep navy sport band (in the picture right), gold with a pink sand sport band (in the picture left), (product) red with a red sports band, silver with a white sports band and dark "space grey" with a black sports band. Numerous other body and watch strap combinations from Apple are individually designed, but also available. on January 26, 2021 added Apple a limited edition "black unity" option for this model with a black