Revolabs 02-DSKSYS-D xTag USB Wireless Microphone System, Radio Frequency 1920 to 1930 MHz, 128-bit encryption, 65 feet (20 meters) range, Up to 8 hours talk time, Plug-and-play Simple Set-Up: Plug-and-play without the need to install drivers Crystal-Clear Audio: Be heard with spoken word clarity No GSM Interference: Revolabs wireless microphones are impervious to GSM noise from other wireless electronic devices Secure: 128-bit encryption for HIPAA compliance The Freedom of Wireless: Cut the cord for the freedom of mobility during Skype calls, Web meetings, recording, dictations, and more