Many USB sticks and PCMCIA card for UMTS/3G don't offer a connector for an external antenna. THis is where these inductive coupler helps! The couplers are mounted to the device with Velcro© strips (ADPT-024) or just pushed over the USB stick (ADPT-026). Both adaptors have a SMA female connector for which we offer a large selection of antenna cables. Works with any mobile phone or data modem, regardless of frequency (LTE, GSM, UMTS/3G) or system used (GPRS, EDGE, HSPA).