Works with karaoke & PA systems; Twin-pack wireless microphone system; Dual signal indicator; Freq range: VHF/FM 109-120Mhz; Freq resp: 100Hz-1kHz; Freq output power: 8mW; Deviation range: 30kHz; Includes dual wireless microphones, receiver, telescoping antennas, 2 x 9V batteries & dual signal indicators for unhindered mobility;