Display: With a 13.3-inch LED-backlit widescreen display with support for millions of colours. Processor: With a 1.6GHz dual-core Intel Core i5 processor with 3MB shared L3 cache. Battery: Built-in 54‑watt‑hour lithium‑polymer battery for up to 12 hours of web surfing. Features: Plus a 720p HD camera, two USB 3 ports, stereo speakers, Bluetooth and more. Macbook: Get a refurbished 2015 13" Macbook Air - choose 4GB or 8GB of RAM! SSD: With 128GB of internal storage for all your photos, videos and apps. Operating system: Sierra (released in September 2016). 2015 Macbook Air 13 | 4GB | Living Social