[Wireless microphone and headphone system] Only applicable to microphone jack, to auxiliary jack, otherwise there be no sound. This wireless headphone microphone adopts a high-sensitivity capacitive microphone, which can pick up sound 360°, with clear and distortion free sound quality. Signal stability, No delay, No radiation, Anti whistling, Anti interference, Constant frequency. [Plug and play wireless headphone microphone] This fitness microphone earphone is convenient to use, just plug and play. After successful matching, the blue light of the indicator light stop flashing. No further action was taken. Note: This is not a Bluetooth microphone. [Wireless microphone headphones and handheld 2-in-1 and 3D stage reverb effect] There are two ways to use wireless earphone microphones for singing: as a universal earphone microphone, or by removing the head stand, it become a handheld microphone. Simultaneously pressing the wireless "+" and "-" volume buttons on the head microphone activate the stage reverb effect, intelligently beautifying your voice and making it more three-dimensional. Color:Black Material:plastic Package Contents: 1set * microphones 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.