Features: Wireless UHF System: The UHF system includes handheld microphone and one receiver, featuring 16 channels and long distance operation, with LED screen to display transmitter parameters. Dynamic Handheld Microphones: Portable handheld microphone Features dynamic pickup, total 26.5cm/10.4inch length makes it comfortable to hold, widely suitable for broadcast, interview, church and more. 6.35mm Plug Receiver: The receiver with 6.35mm plug can be applicable for speaker, audio mixer and DVD player, 3.5mm audio adapter(Not included) is necessary for camera connection. Battery Powered: The handheld microphone is powered with 2pcs AA batteries, the receiver is powered by a 18650 battery and can be recharged with USB cable included.(Batteries Not Included) Wide Application: The headset microphone system can be widely applicable for video recording, broadcast, interview, online teaching and more occasions. Specifications: Model: AD-231 Transmission Range: 30-50 meters --Technical Specifications: Frequency Range: 630-690MHz Frequency Channel: 16 channels Oscillation Mode: DSP chip frequency lock Frequency Stability: 10ppm Frequency Power: 10dBm Frequency Response: 40-18kHz Distortion: 0.5% Power Supply: 2pcs 1.5V AA batteries(Not included) Working Time: 4-8 hours --Receiver Specifications: Frequency Channel: 16 channels Oscillation Mode: DSP chip frequency lock Frequency Stability: 10ppm Receiving Sensitivity: -95~-71dBm Frequency Response: 40-18kHz Signal to Noise Ratio: 90dB Audio Output: Max.300mV Power Supply: 1pc 18650 lithium battery(Not included) Package Size: 30 * 12.5 * 6cm / 11.81 * 4.92 * 2.36in Package Weight: 450g / 15.87oz Packing List: 1 * Handheld Microphone 1 * Receiver 1 * Microphone Silicone Ring 1 * USB Charging Cable (Type-C) 1 * User Manual