For a list of all currently documented ZyDAS chipsets with specifications, see ZyDAS.
For a list of all currently documented Philips chipsets with specifications, see Philips.
..."401-0010 V0.2" (or something) and the PLOTECH logo is silkscreened on the board in the FCC photos.
Additional specifications, per the FCC manual, follow...
- RF Output Power: 15~17 dBm
- Receiver Sensitivity: < -80 dBm @ 11Mbps (PER < 0.05)