Shure wireless 
• User friendly wireless system perfect for spoken word applications
• One-touch QuickScan frequency selection quickly locates the best open frequency in case of interference
• BLX1 body pack ideal for use with lavalier, headset, earset and instrument mics and guitar cables
• XLR and 1/4" output connectors on receiver
• Up to 300 ft (91 m) operating range for total wireless freedom
• Up to 14 hours of continuous use from 2 AA batteries
• Offers a 24 MHz tuning bandwidth and up to 12 compatible systems per frequency band