Features: UHF Wireless System: The system includes dual headset microphone and one receiver, featuring UHF wireless transmission, stable connection and low distortion ensure high quality vocal sound transmission.  Headset Style Microphone: The wireless headset style microphone enables easy wearing on your head, designed shaped to fit your head better, battery powered for more portable application.  Receiver with LCD Display: The receiver can be steadily set on table or ground, with LCD screen to clearly display parameters like frequency and battery condition, to meet digital adjusting.  Battery & Adapter Powered: The dual headset microphone are powered by built-in 3.7V/450mAh battery, recharged via USB cable included. The receiver is powered with included power adapter.  Wide Application: The headset microphone system can be widely applicable for video recording, broadcast, interview, online teaching and more occasions, truly portable wireless connection.   Specifications: Color: Black;  Main Material: Plastic;  Signal to Noise Ratio: 96dB;  Frequency Response: 30Hz-18KHz;  Distortion: <0.1%;  Dynamic Range: 96dB;  Delay: 2.5ms;  Frequency Points: Up to 48;  Transmitter Power: 10mW;  Receiver Sensitivity: -96dB;  Transmitter Power Supply: Built-in rechargeable battery 3.7V/450mAh;  Receiver Power Supply: US plug power adapter(Included)， AC110~240V;  Battery Duration: About 5 hours;  Receiver Dimension: 8.5 * 8.5 * 17.5;  Package Size: 31 * 19 * 10cm / 12.20 * 7.48 * 3.94in;  Package Weight: 1250g / 44.09oz;   Packing List: 2 * Headset Microphones;  1 * Receiver;  1 * 6.35mm Audio Cable;  1 * Micro-USB to Type-A Cable;  1 * Power Adapter;  1 * User Manual