Adopts UHF technology, enabling remote wireless transmission for easier operation without wires, with a transmission distance of up to 20 meters. Offers a broader frequency range and reduced interference, delivering clear and high-quality sound reproduction. Features precise electronic circuit control that captures full-bodied sound directly from the source. Ideal for various applications such as karaoke, live performances, conferences, church events, school presentations, halls, and parties. The USB receiver can be powered by a USB charger, power bank, or similar USB power source. Suitable for use in studios, karaoke setups, radio broadcasting, and other o applications. Specifications: Frequency: A: 262.85MHz, B: 268.85MHz Transmission distance: 30-50 meters PCB board voltage: +5-9V o frequency response: 40Hz - 15kHz o dynamic range: over 100dB o output: 0-200mV Maximum operating distance: over 80 meters Receiver supply voltage: 3.7V - 4.2V (lithium battery) Receiver working current: less than 80mA Receiver continuous working time: up to 10 hours with standard 3.7V/800mAh battery Transmitter working current: less than 80mA Transmitter working time: 10-18 hours Color: black Material: plastic Size: 250 x 50mm Package Contents: 1 pair of microphones 1 adapter 1 connection cable 1 receiver (battery not included) Note: The package includes only the items listed above. Other accessories or products are not included. Note: Lighting and display differences may cause slight variations in color between the product image and the actual item. Measurement may vary by +/- 1-3 cm.