EASY TO USE: Headphone adapter cable from both USB ports to RJ9 jacks. The RJ9 jack is connected to the earphone and the USB jack is connected to the computer. Comes with a mic control box: LCD digital cycle timer timer switch to turn off the mic, adjust the volume and turn off the speaker with just the press of a button. Working Status Indicator: The green standby indicator on the timer switch of the LCD digital cycle timer programmer 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: short 158 cm cable, modular clock, LCD digital timer to easily move the adapter, while protecting computer USB interface efficiently. LCD display - Weekly programmable electronic relay time - 16 ON and OFF modes (AC 220V). Advanced presets one week ahead . General purpose digital electronic timer with daily and weekly programs. Repeat programs with 16 on/off settings. Precise minute setting . The LCD screen displays hours/minutes and on/auto/off in real time. DIN rail mounting without DIN rail. Dimensions : 86 x 36 x 65 mm. Contents: 1 timer, 1 English manual