EASY TO USE: Headset adapter cable from two USB ports to RJ9 jacks. The RJ9 jack is connected to the headphone and the USB jack is connected to the computer. Comes with a microphone control box: LCD digital cycle timer timer switch to turn off the microphone, adjust the volume and turn off the speaker with just one touch. Working status indicator: The green standby indicator on the timer switch of the LCD digital cycle timer programmer is always on, the green call indicator flashes, and the sound is off and flashes red. Unique design: LCD digital cycle timer timer switch. Lightweight, elegant and compact design that maximizes comfort and ease of use. Flexible and practical: modular clock, digital LCD timer for easy movement of the adapter while effectively protecting the USB interface from the computer.