I’ve had it less than one year, the system is like new barely any use, it comes with everything that was in the box. Here’s the description as found in Valve’s page:

512GB NVMe SSD 1280 x 800 optically bonded LCD display with premium anti-glare etched glass 7" Diagonal display size up to 60Hz refresh rate 7nm APU Wi-Fi 5 40Whr battery; 2-8 hours of gameplay (content-dependent) 45W Power supply with 1.5m cable Carrying case