Yet it is fun to open it up and have a look of the design. Interestingly, there is a large 8Mb ram as buffer. MicroSD is changeble and is class4 . ATTO test of stock microSD card is very fast, indeed. The unsatifactory performance is likely caused bt the slow encoding chip STK2365 , capturing in 15fps motion JPEG. I cannot find any information from alldatasheet. As far as I know , there is only 3 chip factories that is capable of making FullHD 30fps low cost encoding chip . Default setting will capture continuous video clips of each 20mins size 1.3GB . If configuration is allowed to capture at 720p with 30 frames, then this is a very good gadget.
Performance in no light situation is good with help of IR, which gives some spotted reflection underneath the glass.