Shure BLX1-H8 Wireless Bodypack Transmitter, 518-542 MHz

Features:

• TQG connection for Shure lavalier, headset, earset, instrument mics or guitar cables
• Tactile on and off switch
• Adjustable gain control
• Lightweight, rugged construction
• Up to 14 hours of continuous use (2x AA batteries included)
• Up to 300 feet (100m) transmission radius (line of sight)
• Quick and easy frequency matching (GROUP and CHANNEL selection buttons)
• Two-color transmitter status indicator LED
  • Green: "Ready"
  • Rapidly Flashing Red: "Controls Locked"
  • Solid Red: "Battery Power Low" (less than1 hour remaining)
  • Flashing Red/Power Down: "Batteries Dead" (replace batteries to repower transmitter)