USB Net Power 8800 Pro Single Outlet AC Power Controller w/Current Meter - Softw USB Power controller: lets you turn on or turn off devices using your PC Network power control with Current Meter SDK available for development and system integration - Local LAN control support Relay status can retain even if USB is disconnected or PC/software is not running Retractable USB cable included, expands up to 30-inches and retracts back to 4-inches