Yesterday I received the RX888 designed by Justin Peng and Howard Su.
The first impression in opening the shipping package is that it is very small. It is as big as the Cypress fx3 superspeed explorer kit !
In case there is the internal trimmer that allows you to calibrate the reference oscillator when you have a reliable reference.
There are few spurious signals.
Here is a picture of 8MHz of the FM band.