Specification 

Model	Z1
CPU	Bay Trail-T 3735F Quad Core 1.33GHz
	Turbo boost up to 1.84GHz
Ram	2GB DDR3L-1333
Storage	32GB  eMMC (16/64G for option)
	Expendable via Micro SD card (up to 128GB)
	Expendable via external hard drive
GPU	Intel HD Graphics
Networking	Wifi 802.11 b/g/n
	Bluetooth 4.0
	3G WCDMA (optional)
	10/100Mbps Ethernet (supported by external Ethernet adapter)
I/O	HDMI x 1
	USB2.0 x 3 (one on AC adapter)
	3.5mm audio line-in / audio line-out x 1
	Micro USB2.0 + Power in (two in one) x 1
	Micro SD Card Reader x 1
Size	121 x 99 x 12 mm (L x W x H)
Weight	115g
Operating System	Windows 8.1 with Bing (x86) pre-installed

For those who use this system for GNU/Linux demand money back.
https://wiki.fsfe.org/WindowsTaxRefund

It would be better if the machines where sold without an OS installed.