Dual Channel VHF Receiver, Dual Channel System permits the 2 included mics to operate simultaneously, Up to 100" range, 50" under normal conditions, Microphones operate for up to 8 hours on 9V alkaline, Super heterodyne receiver is ideal for karaoke and presentation use, Two Handheld Microphones, Low T, H, D, Noiseless Transmitters, On/Off switching, Full Frequency Response: 40Hz-15KHz, Volume Level Controls For Each Channel, SKU: TBALL8702