Rechargeable wireless microphone live sound card with smart LED display for unlimited distance Advanced microprocessor intelligent noise reduction adopts high quality microprocessor to protect your voice Frosted touch feel comfortable grip advanced touch, anti hand , easy to control UHF wireless transmission. One-time automatic frequency matching, anti-interference, strong signal penetration, one-step connection to start singing immediately High environmental protection material, comfortable grip, one-hand control. Frequency response range: 100HZ-20KHZ Signal-to-noise ratio: 60dB Microphone Type: Dynamic Plug Type:US Plug,it applies to Canada, India,Mexico, Thailand, the , the Philippines,Taiwan and so on. Material: ABS colour: black Voltage: AC100-240V Package Contents: 4 x Microphone 1 x Host 1 supply 1 x Audio cable