Operating system Android Special features Lightweight Battery capacity 305 Connectivity technology Bluetooth Wireless communication standard Bluetooth About this item Interchangeable bezel designs and switch fluidly between styles to suit any occasion. Encased in a lightweight aluminium alloy, Watch Pro 2 is crafted in a slim profile that offers style and durability at the same time. Choose from four straps to match your daily activity and personal style. Liquid silicone flexes with you during your workout, while leather adds a touch of refinement.