... • USB flash disk • SD/MMC Card Player• VHF Wireless MIC• Reach audiences up to 350 in rooms up to ... to get stronger power. FeaturesUSB/SD/MP3/FM, two channels wireless mic, wired mic, echo, AUX input, MIX outputFrequencyVHF 174 ... -270MHzChanneltwo channels wireless mic, USB Devicesensitivity12dBuVOscillation modePLL Synthesizedspeaker5 1/4” 4Ω full range ...