See the 5Fans thread that announces their beta test round [Google Translate].
As the render shows, no Volume buttons (problematic for rooting), the iFive Skin is back in all its glory (horror?), and the back is again WiFi-sabotaging all-metal. The only new thing is the 8MP back camera.
Five said they’d be the first out with a Rockchip 3288-based tablet. They’re third, behind Teclast (first; P90HD) and Pipo (second; P1). Whatever excitement there was for this tablet has been tempered by the ongoing and unresolved problems of their 3GS and reviews of other 3288-based tablets.
It’s not yet listed at their site so full specs aren’t yet available. The size of the battery will be interesting. How far down will Five crank screen brightness to squeeze out more battery life?
Here are the previous published specs from the 5Fans forum, which could be subject to revision:
IPS wide viewing angle Resolution: 2048×1536 (QXGA)
Size: 7.9
Dimensions: 198.7mm (height) x134mm (W) x7.5mm (thick)
Weight: 330 grams Battery: 5600mAh/4.35V
Processor: Rock-Chips RK3288 1.8GHz quad-core Cortex A17 architecture processor Graphics Processor: Mali-T764
RAM: 2GB
Operating system: Android 4.4.X
10:00-touch dual-band wifi 2.4GHz/5GHz
Camera: 2 megapixels front camera 8 megapixels autofocus
Previously here:
iFive Mini 4: More Official Details
iFive Mini 4 Specs Released
iFive Mini 4 Teased
iFive Mini 4: New Information
Rockchip 3288-Based Retina-Class iFive Mini 3! [Updated: Mini 4!]
Mike Cane’s xBlog 
the back looks like the Thunderbirds 2 to me…..