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 switch to turn off the mic, adjust the volume and turn off the speaker by pressing simply press one button. Working status indicator: LCD digital cycle timer programmer timer switch green standby indicator is always on, green call indicator flashes and the sound is off and flashes red. Unique design: LCD digital cycle timer switch Lightweight, stylish and compact design that maximizes convenience and functionality. ease of use. Flexible and practical: short 158 cm cable, modular clock, LCD digital timer to easily move the adapter, while effectively protecting the USB interface LCD display - Weekly programmable electronic relay time - 16 ON and OFF modes (AC 220 V). Advanced presets one week before. />Digital electronic timer general purpose with daily and weekly programs. Repeat programs with 16 on/off settings. the minute. The LCD screen displays hours/minutes and on/auto/off in real time. Mounting on DIN rail without DIN rail. Dimensions: 86 x 36 x 65 mm. Contents: 1 timer, 1 English manual