This is cable not adapter you don't need extra Hdmi cable!!!!

Mini DP(DisplayPort) to HDMI Cable

Microsoft Windows Surface Tablets (2012)
Microsoft Surface Pro 2

Microsoft Surface Pro 3 (2014)

Microsoft Surface Pro 4 (2015)

Description: Powered by Mini DisplayPort source.
Support uncompressed audio such as LPCM.
Supports HDMI highest video resolution 1080p.
Supports HDMI 12 bit per channel (36 bit all channel) deep color.
Supports HDMI225 MHz / 2.25 Gbps per channel (6.75Gbps all channel) bandwidth.
Supports Mini DisplayPort 1.1a input and High Speed HDMI specification (Version 1.3b) output.
Support compressed audio such as DTS Digital, Dolby Digital (including DTS-HD and Dolby True HD).
It not only has an elegant appearance with the white color but also brings much convenience with its small size.
Mini DisplayPort offers a unified, scalable, and cost effective interface for embedded and external display applications.
The mini DisplayPort to HDMI Adapter lets you connect a high definition monitor, projector, or LCD that uses a HDMI connector or cable to a MacBook, MacBook Pro, or MacBook Air with a mini DisplayPort.
It offers solutions for digital entertainment center, HDTV retail and show site, HDTV, STB, DVD and Projector factory, noise space and security concerns, data center control, information distribution, conference room presentation, school and corporate training environments.