Specifications Type Type II PC Card 32-bit CardBus Multislot class 10  Size 101.0 x 54.0 x 5.0 mm 4.0 x 2.1 x 0.2 inches Weight 42.0 gr 1.5 oz Antenna MMCX standard connector for external antenna (for use in low signal strength areas) Integrated antenna, 15mm extended  Supported operating systems Windows? Me Mac OS X (supported by 3rd party free download) Windows? XP (Pro, Home, Tablet) Windows? 2000 (SP4) Windows? 98SE  Drivers PC/SC driver NDIS 5 driver  Networks GSM 850 EDGE CSD GPRS WLAN 802.11g WLAN 802.11b GSM 900 GSM 1800 GSM 1900  Performance EDGE Download speed: Upload speed:  up to 247 kbps up to 123 kbps  CSD Download speed: Upload speed:  up to 9.6 & 14.4 kbps up to 9.6 & 14.4 kbps  GPRS Download speed: Upload speed:  up to 86 kbps up to 43 kbps  WLAN 802.11g WLAN speed:  up to 54 Mbps  WLAN 802.11b WLAN speed:  up to 11 Mbps  Features ? Power class: GMSK-Class 4 (850/900 MHz), Class 1 (1800/1900 MHz), 8 PSK-Class E2  ? SIM Card: supports 1.8 and 3-Volt SIM cards  ? Data: TCP/IP version 4  ? Error correction: End to End MNP2-4, LAPM (V.42), Network supported RLP  ? Compression: MNP5, V.42bis GSM & TCP/IP Header Compression  ? SIM toolkit: Class 2 with Call Control  ? Multichannel: 3 multiplexed channels (parallel communication paths to card)  ? Environment: operating -10? to +55? C, storage -20? to +65? C  ? &nsp; Compliant with WEEE (Waste of Electrical and Electronic Equipment)  ? Lead-free in compliance with RoHS (Restriction of use of certain Hazardous Substances Directive)  ? Power consumption: ? Compliant with PC Card standard  ? Certifications: GCF, PTCRB, CE, FCC, MS WHQL  ? WiFi certified  REQUIREMENT 500 pcs. In every item