1、This handheld microphone device makes clear and loud sound, which means that it can allow a clear amplification of the sound. 2、There will no any static or humming sound produced in such device, it can be your ideal choice. 3、Being perfect for karaoke, weddings, and public speaking, this handheld microphone wireless kit is also suitable for duets. 4、Dual microphone system is ideal for small bars, pubs, mobile discos and karaoke singers. 5、It not only can be used on the stage of family, but also it is suitable for any other occasions that require a beautifully amplified sound. 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 Maximum Input Sound Pressure: 130dB SPL 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