About this item 【1.78" AMOLED Display】 - Fire-Boltt Visionary has a premium 368*448 Pixel Resolution and 1.78" AMOLED Display which comes with the Always On feature. The watch has 700 NITS Peak Brightness to beat the sun rays and shine brighter 【 Battery Life】- The watch can work for 2 Days with Bluetooth Calling ( Normal Usage )*, 5 Days without Bluetooth Calling & Always On Display. System requirements: Bluetooth version 5.0 and above. IOS 7.0 and above, Android version 4.4 and above. Charging Specs - The watch needs to be charged for 3 hours to reach 100%. The charger should be a 3.7V to 5V adapter or any laptop output. For a bare minimum of 20% charge the watch needs to be charged for about 30-40 mins 【Connect TWS On The Go】- This smartwatch has an internal storage memory of about 128MB to store your songs and listen to local music on your bluetooth headset There is no volume control, however when connected to bt calling you can control the volume of the call. 【AI Voice Assistance】- Command your watch and let the magic happen. This special technology is in the Fire-Boltt Visionary Smartwatch; Supported Applications - Notifcations from all social media channels (Instagram, Whatsapp, Facebook), Call Notifications, Health Tracking (SpO2, Heart Rate, Sleep), Sports Tracking & many more