TCTEC Super4 USB Relay module - TCTEC-S4USB - Sedonia Technologies
KMtronic USB relays from Mach3 - step by step
USB 8 Relay Manager - Denkovi A E LTD
Denkovi 4-channel USB Relay Board Module Controller for Automation Robotics - v2 | eBay
Unidad gratuita/interruptor de Control usb, módulo de relé de 1 canal 5V, interruptor de Control de computadora, PC, Control inteligente para Arduino| relay module|switch pccontrole usb - AliExpress
USB 16 Relay Manager - Denkovi A E LTD
DIGITAQ USB Relay Manager
USB 8 Channel Relay Board
OpenHacks | Open Source Hardware | Productos | 12V USB Relay 4 Channel Programmable Computer Control
USB 8 Relay Manager - Denkovi A E LTD
USB 16 Relay Manager - Download - Developed by Denkovi and is used for controlling all USB 16 Relay Boards
USB 8 Relay Manager - Denkovi A E LTD
16Amp, 8 Channel USB Relay Module , from Devantech for €66.17
USB Relay Module 1 Channel 5V HID Driverless Programmable Computer
USB 16 Relay Manager - Denkovi A E LTD
TUTORIAL] Automatizar el encendido/apagado de LEDs con un relé USB y RocketLauncher
DMX-USB-RX-RLY8 Relay Output Module 4 Relays 4 Dimmer , from Devantech for €80.37