Detailed Product Description modems,wireless modem,modem linkHSPA USB Modem M73LUMTS band: 2100Mhz,Built-in ... , Windows Vista, MAC OS x 10.4,Support: USB interface,Wireless mode choice: only3G / 3.5 G (WCDMA/HSDPA)Supporting SMS ... (L) x 27 (W) x 12.05 (H) mm,Weight: 23 g.