Description: Connect the USB control box with the crystal head headset, and use the USB plug with the USB control box to connect to the computer.USB control box with built in volume switch and microphone/speaker mute for easy control. The crystal head earphone turns the USB earphone cable, allowing your earphone to be used both ways. So you can more comfortable interacting with others. Specifications: Condition: 100% Brand New Total Length: Approx. 158cm Control Box Size: Approx. 8.8 * 3.5 * 1.8 cm / 3.4 * 1.3 * 0.7 in Weight: Approx. 131 g Usage: 1. Connect the equipment. 2. The computer recognizes the hardware and installs the drive automatically. 3. Test call: If not, start menu control panel sound and audio devices voice. 4. Sound playback: select the USB Headphone Set device. 5. Recording: select the USB Headphone Set device. Package Included: 1 x Convert line 1 x English manual Notes: 1.Please allow 1 to 3 cm error due to manual measurement. Thanks for your understanding. 2.Monitors are not calibrated same, item color displayed in photos may be showing slightly different from the real object. Please take the real one as standard. See more

?After Sales Service?If you have problems about the convert line, please contact us without hesitation, we'll solve it until you are satisfied. ?Contorl Your Microphone?You can turn off the microphone by simply pressing it.Microphone close button. ?USB Connect to Computer?The RJ9 jack connects to the earphone, and the USB plug connects to the computer. The crystal head earphone turns the USB earphone cable, allowing your earphone to be used both ways. ?Working status indicator light?The standby green light is always on, the call green light is flashing, and the closed sound is flashing red light. ?Volume Control Button?Volume up or down buttons can adjust the sound you want. The close button can turn off the speaker to avoid unnecessary information transfer.