Here's a YouTube video review by AstroBackyard:

The GPCAM cameras can be fully controlled in AltairCapture and SharpCap to output uncompressed .AVI and .SER video files for solar system "lucky" imaging, as well as all common still image formats such as .JPEG .PNG .TIF .BMP, to mention just a few. The GPCAM supports 8bit or 12bit output. The 12 bit output mode can be used for deep sky imaging with less frames needing to be stacked and a wider pixel intensity range, or for high dynamic range solar and lunar imaging where bit depth improves tonal range. The AR0130 sensor is extremely sensitive in the NIR region and can be used very effectively with IR Pass filters such as the Altair Planet Killer series, for solar and lunar imaging in mono mode. Simply attach the IR pass filter to the front of the 1.25" nosepiece.

What’s different about the "Purple casing" GPCAM2 platform compared to the blue casing GPCAM1 platform? You’ll notice the GPCAM2 casing is larger than the GPCAM. This is to house larger electronics boards which support trigger mode and frame buffering as well as to increase the surface area for cooling. The GPCAM2 platform supports "Trigger Mode" to make long exposures of over 5 seconds easier to control. With most cameras, in normal video mode, you have to wait for an exposure to complete before the camera will accept, say a command to abort the frame, for say clouds, aircraft, or an alignment issue, like kicking the tripod and so-on, or for routine changes in gain, exposure time, , re-aligning or refocusing on the object. For long exposures, normal video mode is inconvenient, especially for video astronomy and deep-sky imaging, however in Trigger mode, you can stop the camera instantly (even if you are half way through a long 30 second exposure) change the settings, and re-start the camera looping again. The GPCAM2 also has an improved onboard frame buffer to improve data transfer stability at high frame rates (to reduce dropped frames) and to increase compatibility with a wider range of PCs. The improved buffers give a more consistent data transfer rate over USB2.0 and USB3.0 buses on laptops and desktop PCs.
 
Some interesting features of the AR0130 Mono sensor, aside from increased overall sensitivity compares to the MT9M034 sensor in the GPCAM1, is a very high response in the red region of the spectrum making the camera very sensitive to red light for Hydrogen Alpha solar imaging and in the NIR / IR region which enables the camera to be used with an Altair Planet Killer IR Pass filter for high contrast lunar imaging.

Included in the box:

• ALTAIRGP130M-BASIC Package:
• Camera body.
• 2m High-speed USB2.0 A male to B male cable.
• 1.5m ST4 guide cable.
• 1.25 inch x 20mm nosepiece with female 1.25" filter thread on the front.
• CS-Mount adapter with built-in Clear Optical Window, AR coatings. (Attached at factory but removable).
• Plastic dust cap 1.25"