DescriptionThis is a wireless microphone, which is made of high-quality materials, durable and can be used for a long time. Anti-noise filtering technology provides clearer texture and high-fidelity, very practical. The aluminum alloy body is strong and durable. The microphone has long service life and can support long time use.Features-Color: Black.-Material: ABS, UV, aluminium alloy, black Nickel.-Size: About 22.50X4.50X4.50cm/ 8.84X1.77X1.77in.- Anti-noise filtering technology provides clearer texture and high-fidelity, very practical.- Wireless receiver up to about 50m (classroom environment). You will not be limited by wire.- With high definition digital display screen, you can clearly and intuitively see the microphone frequency band, power, signal and other functions.- The aluminum alloy body is strong and durable. The microphone has long service life and can support long time use.- Clear sound quality, built-in anti-noise cotton to improve noise reduction effect.Specification-Input voltage: 5V-Continuation of the journey: 8-12 hours-Signal to noise ratio: 75 db or higher-Built-in battery capacity: 1200 mA. -2000 mA-Frequency response range: 60Hz-15KHz-Working voltage: DC2.5-4.2 V-Maximum current: 85mA or less-CHA frequency range: 552.5 MHZ to 566.5 MHZ-CHB frequency range: 572.5 MHZ to 586.5 MHZ-Frequency response: 60HZ-16KHZ