. Applicable Object: Home, Computer, Recording, Conference, InterviewPLUG AND PLAY: Wireless microphones are automatically paired when powered on, plugged in and played. No more messy cables. It is a simple-to-use, full-featured Bluetooth microphone. Excellent Noise Cancellation and Sound Quality: Professional full-range audio with CD sound quality. Excellent noise cancellation supports multiple real-time mixing and real-time synchronization of mobile phone background music and live voice. Stable Transmission: The microphone adopts the latest RF chipset with 2.4GHz transmission spectrum. It enables interference-free and irregular wireless transmission up to 20 meters away and provides a safe, reliable, stable and interference-free audio system. Portable & Long Working: Ultra compact and lightweight, easily fits on your shirt or pocket, the microphone can be used for 10 hours on a full charge. Specifications:Frequency: 2.4GHz Input Voltage: DC4.8-5.4V Charging Adapter: for iOS Battery Capacity: 70mAh Package List:Single Channel Receiver * 1 Microphone * 1USB Cable * 1 Microphone * 1 Dual Channel Receiver * 1 Microphone * 2USB Cable * 1 Microphone * 2Note: Please refer to the measurement. A small measurement error is acceptable within the normal range. There may be a slight color difference due to monitor, camera or other factors, please refer to the physical item.