Features: It is a system for professional performance.It delivers truly professional performance with outstanding stability and easy operation.High-fidelity, reproduces the true voice.Voice compression.Dynamic microphone voice coil.Large receiving.Suitable for professional singers on stage in small bars and pubs, disco and karaoke, and home use.Easy to use and affordable alternative that is for meetings, events, speeches, etc.Overall SystemStability: 0.005%(at25c)Ambient Temperature: -10 - +50Max Deviation: 15KHz with Level LimitingDynamic Range: 110dBS/N Ration: >100dBT.H.D: 80dBInput: AC110-240V 50/60HzOutput: DC12V 850MAHPower Safety Approvals: CCCSize: Approx. 225 x 130 x 42mm/8.86 x 5.12 x 1.65 InchesWireless MicrophoneMike: Moving Coil Dynamic Microphone Electret CondenserAntenna: Built-inRF Output: 10mWBattery: 2 x 1.5AA batteries (Not Included)Power Safety Approvals: FCC, CESize: Approx. 267 x 49mm/10.51 x 1.93 InchesPackage Includes:1 x Receiver2 x Microphones1 x au.dio Line1 x Power Charger (Australian Type for Australia and ne.w Zealand)1 x English Manual