Tellus TWL-C11

"51701131P" and "52202" is silkscreened on the board in the FCC photos.

Per the FCC manual..
 * Transmit power
 * 13 dBm (typical)
 * Receive sensitivity (@ BER 10E-5, typical)
 * -80 dBm @ 11Mbps
 * -83 dBm @ 5.5/2/1 Mbps