1、Such kind of microphone can be used in many situation including karaoke, weddings, public speaking, and duets. 2、Allowing a clear amplification of the sound, such handheld microphone device does play a important role for making clear and loud sound. 3、Being suitabe for occasions requiring a beautifully amplified sound, it can be used in family. 4、It can be a good chocice for singers in small bars, pubs, mobile discos and karaoke for its dual microphone system. 5、No any static or humming sound will be produced by such a device which is made of high-quality material. Item Type: UHF Dual Microphone Handheld Professional Wireless Microphone Comprehensive indicator: Frequency Stability: ≤ 10ppm Modulation Method: FM Audio Response: 40-16000Hz Dynamic Range: >105dB (A weighting) Comprehensive Distortion: ≤0.5% (@1KHz) Audio Processing Method: Dynamic compression and expansion technology Working Temperature: 0C to +50 °C Receiver: Oscillation Mode: Quartz crystal oscillation Audio Output Level: 0-3mV Audio Output Impedance: 600Ω Artifact and Harmonic Suppression: ≥85dB Working Power Supply: AC12V-15V/200mA Microphone: Oscillation Mode: Quartz crystal oscillation Frequency Stability: ≤ 10ppm Maximum Modulation: ±50KHz Maximum Output Power: 30mW Harmonic Radiation: <-55dBc Battery: 2 x AA batteries (not included) 2 x Microphone 1 x Receiver 2 x Anti-rolling Ring 1 x Power Adapter 1 x Audio Cable 1 x Instruction Manual 2 x Antenna