Feature: 1. The microphone uses UHF band, the wireless working distance is less than or equal to 80 meters, and the audio signal reception is fast. 2. The background music can be input via Bluetooth or Line‑in, and the microphone volume and reverb can be adjusted via the knob. 3. Support microphone priority function, high sensitivity, background music volume can be automatically reduced or recovered. 4. The hand wheat and receiving box adopt aluminum alloy oxidation process, and the mesh head adopts iron oxide, which is anti‑drop and non‑deformation. 5. Support the frequency conversion operation of professional microphones, 25 channels can be selected, avoid interference signals anytime and anywhere. Specification: Item Type: Microphone Set Microphone: (Gold + Silver) Working Voltage: 1.5V, 2 x AA batteries(not included) Transmitting Power: ≤10MW Transmission Distance: Approx. ≥15m / 49.2ft Sensitivity: -53DB±3db Frequency Range: 540MHZ-559MHZ (UHF frequency band) Variable Working Channels: 25 channels Distortion: ≤1% Signal to Noise Ratio: ≥70db Frequency Response Range: 80HZ-10KHZ Microphone Impedance: 600Ω±30% at 1khz Working Current: ≤150MA Working Temperature: -25℃-60℃ Wireless Working Distance: Approx. ≤80m / 262.5ft (Look at the environmental impact in detail) Receiver: Power Supply: USB mode, 5V 1A Working Current: ≤300MA Sampling Rate: 48KHZ Bit Width: 16bit Delay: ≤5ms Bluetooth: 4.1 Output Amplitude: 500MV Working Temperature: -25℃-60℃ Receiver Size: Approx. 13 x 10 x 3cm / 5.1 x 3.9 x 1.2in Microphone Size: Approx. 24cm / 9.4in How to Use: (See the manual for details) 1. Open the package and take out the product 2. Connect the power adapter (or other DC5V power supply) with the power cord to supply power to the receiving box (without power adapter) 3. Connect the receiving box to the TV, computer, speakers, etc. with an audio cable 4. Put the battery on the microphone 5. Adjust the frequency of the microphone and the receiving box, keep the frequency of the two the same, you can start using. Package List: 2 x Microphone1 x Receiver1 x Power Cord3 x Audio Cable2 x Microphone Stand1 x User Manual