Features:1. UHF digital chip with less than 1ms transmission delay, automatic ID frequency anti-interference ability, more reliable transmission signal, more stable, clear sound.2. Automatic sweep pairing function makes it easier and simpler to use.3. Standard 3.5 to 6.35 audio converter, widely used in all types of speakers and audio equipment.4. The chip comes with a low power prompt and a low power shutdown function.5. With digital circuit processing technology, the signal to noise ratio is higher.6. The structure is made of high-strength ABS, which is beautiful and practical. The lens is made of high-brightness PC material and is more wear-resistant.7. The U-segment frequency is more penetrating, more stable, and the tone is pure.Specification:Sensitivity: -39dB 1dBMicrophone head: single-point capacitiveAudio response: UHF 630-696MHZDistortion rate: <0.5% 400HZFrequency response: 50HZ-1.5KHZCharging voltage: DC 5V 500MAEffective distance: 30mPackage List:1 * Transmitter1 * Receiver1 * USB Charging Cable1 * 3.5 to 6.35 AdapterHeadset Microphone:1. Key operation instructions: long press the power button for three seconds to turn on/off, short press the power button to switchThe screen displays as follows:C00-49 current frequency, a total of 49 frequency points.U0-99 level adjustment2. Charging indicator: The charging red light is on, and the red light is off.Receiver:1. Toggle switch, blue work indicator flashes, (not connected successfully) blue work indicator length (connected)2. Charging indicator: The charging red light is on, and the red light is off.The factory has been paired well, no pairing is required. Please pair the receiver first, then press and hold the power button for 3 seconds. After the power is turned on and pressed for +1 second, the work light flashes and the LED screen runs quickly, which is received in the pairing state. The blue indicator light stops flashing and the pairing is successful. (The default frequency is within 10 seconds after the receiver is turned on. If it is over 10 seconds, it cannot be paired.) Because the machine has automatic sweep function, press +- to adjust the frequency (C00-49). ) Sweep the frequency connection yourself. After switching the frequency point, you need to stay for two to three seconds. If you don't connect, you can cut off a frequency point..Note:Please note that the new type and old type of this product will be sent randomly, and make sure you will not mind before ordering.