The Atomos Ninja 2 Video Recorder is an HDMI recorder and 800 x 480 resolution monitor that records up to 1080/30p/60i resolution directly from your camera's sensor to an HDD or SSD in Apple's ProRes or Avid's DNxHD edit-ready codecs. Color precision records at 10-bit, even from an 8-bit sensor and color sampling at 4:2:2. Recording an 8-bit signal in 10-bit won't increase the quality of the signal but will let you work with the signal in post-production as if it's 10-bit, meaning you can add effects and not see jagged lines and other artifacts. Being able to record direct from the sensor lets you bypass your camera's compression and instead have the first compression be in an edit-ready codec. Generally, the less compressions, the less image degradation.
The operating system is AtomOS 3.0, featuring sophisticated focus and exposure tools and SmartLog, which lets you log in and out points on your footage and tag clips with keywords such as "good shot" and "bad shot".