Check the listing for details. Professional Wireless Microphones KDS UHF-858-G6. Color: Black, Condition: New. Listed at 699.00 USD. Set Contents:2 Wireless Professional Karaoke UHF Mics1 Professional Microphone Receiver1 12V AC/DC Adaptor1 1/4" Premium Microphone CordFeatures:Highly Integrated IC Frequency Control TechnologyAnti-Interference Circuit with CPU Control200 Frequencies Selectable with Manual Controls with LCD DisplayImport High-Performance of electronic components and SMT CraftMetal Handheld with Slip Ring protectionBalance XLR and Unbalance 1/4" OutputsLive Feedback Reduction Technology IntegratedActive Voice Filtering for Clearer SoundSystem Parameters:Frequency Range: UHF 600 ~ 700 MHzChannels: 2 x 100Modulation Mode: FMFrequency Stability: +/- 0.005%Dynamic Range: 110dBMax Modulation: +/- 45KHzFrequency Response: 80 Hz ~ 18 KHz (+/- 3 dB)S/N ratio: > 90dBT.H.D. < or equal 0.5%Working Range: About 80M (Without Obstacle)Working Temperature Range: -10 degrees ~ +40 degrees (Celsius)Receiver Parameters:Receive Mode: Heterodyne Frequency conversion ReceiveIntermediate Frequency: 110 MHz, 10.7MHzAntenna Switch In: BNC/50 OhmRF Squelch: > or = 75 dBMax Level Output: +/- 10dBVTransmitter Parameters:Antenna: Hand-hold Microphone with built-in Screw Antenna, Pocket Transmitter with 1/4' wavelength scourge antennaOutput Power: averaging 20 mW, max 30 mW, mininum 3 mWDisplay: LCDRF Squelch: 50 dB ~ 60 dBPower: DC 2 x 1.5 V AAUse Time: 10 Hours