Check the listing for details. Better Music Builder VM-82U G5 Dual Channel UHF Wireless Microphone System. Color: Black, Condition: New. Listed at 699.99 USD. FEATURESSix-axis gyroscope sensor integrated onto each microphone. Intelligent Energy Control.Automatic Gain Control (AGC) Technology prevent microphone feedback.UHF Dual-Channel in a 2-in-1 Base Module.Utilizing the latest wireless technologies and engineering.Clear Voice Technology delivers crystal clear sound.Wireless Auto Sync System technology makes setting up a breeze.High Definition LCD Screen displays Radio Frequency Level, Audio Frequency Level, Channel, Frequency, Battery, Volume, Mute and Lock.100 selectable channels for each microphone.Manual Frequency Select and Automatic Frequencies Scan.Auto-Mute Mode and Auto-Shutdown activates when microphone is left unattended.AA batteries for easy usage and up to 8 hours of battery life. TECH SPECSA. TECHNICAL FEATURE OF THE SYSTEMChannel: 100 ChannelsFrequency Range: UHF 926~936 MHzFrequency Response: 50Hz~18kHzEffective Use Range: ≈30mFrequency Spacing: 1MHzBand Width: 50MHzPackage Dimensions (WxHxD): 18.9×2.8×13.4 in / 48x7x34 cmShipping Weight: 6.1 lbs / 2.8 kg B. TECHNICAL FEATURE OF THE 2-IN-1 BASE MODULE (Receiver)Signal to Noise Ratio: ≥50dBAudio Output: 1 x Unbalanced TRS 6.3mm SocketSignal Pick Up: CPU controlled selection & pilot identificationMute: Mute & lock loop circuitDisplay: LCDPower Supply: DC 12V with 1.25A, Input: AC 120V (For 220V, you may need to change to a 220V~240V DC adaptor)Receiver Dimensions (WxHxD): 16.5×1.7×5.5 in / 42×4.3×14 cmNet Weight: 2.8 lbs / 1.3 kg C. TECHNICAL FEATURE OF THE MICROPHONETransmitter Power: Low (5mW), High (10mW)Frequency Spacing: 1MHzBand Width: 50MHzDisplay: LCDCapsule: DynamicBattery Life: 8 HoursBattery Voltage: 2 x AA 1.5V Alkaline BatteryMicrophone Height & Circumference: 9.8 & 2 in / 24.8 & 5.1 cm