Check the listing for details. Professional Wireless Microphones KDS UHF-835-G6. Color: Gray, Condition: New. Listed at 399.00 USD. Set Contents:2 Wireless Karaoke UHF Mics1 Dual Charging Mic Stand1 Microphone Receiver2 Microphone Silicon Anti-Roll Rings1 12V AC/DC Adaptor (For Receiver)1 5V USB to AC Adaptor (For Charging Stand)1 1/4" Premium Microphone CordFeatures:Highly Integrated IC Frequency Control TechnologyAnti-Interference Circuit with CPU Control200 Frequencies Selectable Infrared Synchronization with LCD DisplayImport High-Performance of electronic components and SMT CraftMetal Handheld with Slip Ring protectionBalance XLR and Unbalance 1/4" OutputsReceiver Parameters:Frequency Range: 610 - 810MHzChannels: 2 x 100Frequency Interval: 300KResponse: 50Hz ~ 18KHzRF Production: High-Performance Integrated ICRF Bandwidth: 50MHzSignal to Noise Ratio: > 105dB (Weighted Peak)Dynamic Range: > 100dBDistortion: < 1.0% @ 1KHzUse Temperature: -18 ~ 50 Degrees (Celsius)Working Range: 50 MetersReceive Mode: High Performance Integrated ICSensitivity: > -105 dBDisplay: LCDOutput: Mixed - 2 Balanced/ 1 UnbalancedChannels: 2Transmitter Parameters:RF Accuracy: +/- 5ppm < 10KHzNominal Frequency Offset: 25KHzHarmonics: < -45dB / cOutput Power: > 10dB / mDisplay: LCDCurrent Consumption: < 90mA 3.7VPower Supply: 18650 - 1200mAhUse Time: > 12 Hours