Ultra-high frequency wireless transmission technology, Effective reception distance of about 50 meters. Wireless Stable Audio Transmitter, Connect various audio devices, suitable for multiple scenarios. Strong anti-interference stable to use. Compact and portable, multiple sets can be used without interfering with each other. Plug and play easy pairing. Can connect to various microphone devices achieving wireless connection. DC 5V power supply, with built-in rechargeable battery. Wired to wireless grenade conversion system, For Capacitive/dynamic microphones, mixing consoles,musicalinstruments. No need to wait long Plug and use. Wired to wireless, breaking the shackles, the sound is worth wireless possible. Wireless audio transmitter with microphone, Simple operation, convenient use. Enjoy the convenience of wireless, Conference room turns into a wireless, microphone device in an instant. Intelligent noise reduction clear sound quality. Upgrade the line to ensure signal lossless transmission. Frequency range: 510.00-590.00MHz Receiving sensitivity: -88dB Power supply: DC5V Total harmonic distortion: 0.2% Dynamic range: 110dB Output power: 10mW Frequency response: 20Hz-20KHz(3dB) Transmission distance: 30-50m Color: Black Material: plastic Package Contents: 2 x Receiver 4 x Transmitter 2 x adapter 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.