EASY À USE: Headphone adapter cable from both USB ports to RJ9 jacks. The RJ9 socket is connected to the RJ9 socket. the earphone and the USB jack is connected to the the computer. Delivered With a mic control box: LCD digital cycle timer switch to turn off the mic, adjust the volume and turn off the speaker with the press of a button. Working status indicator: The green standby indicator of the timer switch of the LCD digital cycle timer programmer is always on, the green call indicator flashes and the sound is turns off and flashes red. Unique design: LCD digital cycle timer switch. Lightweight, sleek, compact design that maximizes convenience. and ease of use of use. Flexible and convenient: 158 cm short cable, modular clock, LCD digital timer to easily move the adapter, while effectively protecting the computer's USB interface.