brand：Study of cable

Model：JF-509

2.4G one with two wireless microphone speaker products：

1, one with two wireless design, can also use two microphones, enhanced interactivity, high fidelity 2.4G perfect sound quality, clear voice, loud.
2, low power design, with automatic protection device. Do not use more than 10 minutes, will be cut off automatically when the power amplifier, audio signal input automatically open. Save electricity and prolong service life.
3, the use of energy-saving technology ultra-low emission power, electromagnetic radiation is only ordinary mobile phone 1/90, worthy of the name "green wireless microphone".
4, with professional ID code encryption transmission technology, ID coding up to one million units, each product is only a single ID code. Use the same equipment in the same place without interference.
5, the microphone volume control switch design, easy to users according to the environment, adjust the volume at any time.
6, GFSK digital modulation / demodulation mode
7, 20Hz ~ 20KHz frequency response
8, 90dB audio dynamic range
9, working in the 2.4GHz ISM band, 20 working frequency points
10, -85dBm receiving sensitivity, 45dB adjacent channel suppression, 30dB image rejection
11, effective reception distance of 20 meters
12, (optional campus broadcast priority function.)
2.4G one with two wireless microphone speaker instructions:

    1.按上述方法把音箱系统连接好，先把主箱总音量调至最小，接通电源。主箱电源指示灯亮并快闪。
    2.对频：在距离主箱3米内，轻轻按压话筒电源开关键，话筒指示灯由红蓝交替闪烁变为蓝色灯慢闪，对频成功（若话筒指示灯不亮，请检查话筒是否有电）。
    3.调节音箱上高低音旋钮，至话筒传出声音听起来舒适悦耳。
    4.打开电脑音乐，电脑音量调至合适的位置。音箱系统即可正常使用了。
    5.再次使用音箱系统就不需要调试音箱，打开话筒对频成功即可使用，控制好话筒音量避免近距离使用时，音箱产生啸叫。