Rechargeable built-in 1000mA DC 5V battery provides 2-3 hours of charging time and approximately 10 hours of usage, ensuring long-lasting performance. Dual microphone input with 2-in-2-out configuration allows for versatile audio setups, making it ideal for various applications. Frequency shift of 5Hz +/-1Hz ensures precise audio adjustments, enhancing sound quality and clarity. Transmission gain boost ranging from 5-14dB allows for optimal sound amplification, catering to different audio environments. Compact dimensions of 7.2*7*28cm easy to transport and integrate into any audio setup. The Mini 2-in-2-out Feedback Suppressor is designed to enhance audio performance with its advanced features. It offers a reliable power supply with a long battery life, dual microphone inputs for flexibility, and precise frequency adjustments. The gain boost capability ensures that your sound is always at the right level, while its compact size makes it a convenient addition to any setup. Color: Black Material: Aluminum Alloy Package Contents: 1*Suppressor 1*Charging cable Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.