V811 V1/V2/V3/V4, use:  V811 Core4_v4.4_v1.rar:    http://pan.baidu.com/s/1sj6OQ4H

V811 V5, use:  V811 Core4_v4.4_v5.rar:   http://pan.baidu.com/s/1c0EGVfU

The improvements for as translated by Google Translate are as follows:

1. upgrade to version Android4.4.2
2. starters upgrading Onda
3. desktop screenshot plan menus and other features to increase
4. Optimize CPU performance
5. Optimize system memory
6. Optimize power consumption
7. Optimization touch response faster, smoother operation
8. optimized multi- tasking
9. new Google Cloud Print function

Disclaimer:
1.android4.4 system memory configuration changes greatly, resulting in the current portion of APK compatibility problems . After our rigorous testing , known as the compatible APK have fun , Ou Peng , Baidu HD, Baidu browser , hao123, QQ input method , micro-channel , etc. ;
2 issues need to escalate the application development side APK version is compatible android 4.4 to a final solution . Onda android4.4 system or tablet is not the problem . Meanwhile, the company will work together with Onda other application development side , on the basis of the beta continue to improve system stability and compatibility ;

Note:
1 , the firmware package containing tutorials and Brush Brush tool, using a desktop computer Brush ;
2 , Brush risks , please read carefully before Brush tutorial ;
3 , the beta version of the firmware is only applicable to V1, V2, V3, V4 (added: OR V5) version of the model ;
4 , check the version number , see the back of the fuselage SN code 9,10 bit ;

Note, that the date of release for these were incorrectly specified as 2013-01-11 on the firmware selection page:  http://www.onda.cn/Tablet/ProductInfo.aspx?ProductId=242&d=down

FYI, the http://www.onda-tablet.com site is garbage!!!!! They are just a retailer, and DO NOT have any real affiliation with the ONDA manufacturer.  They only copy & translate at their own leisure.  Use Google Translate on the real ONDA site for accurate & updated firmware information.