EASY TO USE: Headset adapter cable from two USB ports to RJ9 sockets. The RJ9 socket is connected to the earphone and the USB socket 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 at the touch of a button. Working status indicator: LCD digital cycle timer programmer timer switch green standby indicator is always on on, the green call indicator flashes, and the sound is off and flashes red. Unique design: LCD digital cycle timer timer switch. Lightweight, sleek and compact design that maximizes convenience and ease of use. Flexible and practical: modular clock, LCD digital timer to easily move the adapter, while effectively protecting the USB interface from the computer.