1 2 4 8 Channel USB Relay Control Switch Programmable Computer Control for Smart Home Description: 100% brand new, high quality Features: This module uses HID technology, foreign trade quality, without any driver, there is an application program in the download materials, plug and play. Support WIN7, XP 32-bit, 64-bit system, easy to use. We provide the application and C ++ secondary development library code. There is no VB code, but they are all dll files. So if you can operate on VB, you need to try it yourself if you are familiar with VB. Module application: Home smart switch control, hotel smart switch, hotel smart appliance control, smart greenhouse greenhouse, shopping mall smart switch, company factory smart switch, internet cafe timing management, karaoke timing control, internet of things, industrial control equipment, test equipment power control, street light management , Intelligent management, centralized power management, etc. Maximum control of AC 250V, 10A AC load and maximum DC30V 10A DC load Wiring diagram: Chinese and English software interface: 1. Green means relay is closed, red means open 2. After opening the device, the software automatically obtains the current working status of the relay Module description: 1. Onboard square USB interface, stable connection 2. Use imported high-performance USB control chip 3. Use special relay driver chip ULN2803, relay work is more stable 4. Use genuine Songle relay 5. Production of military PCB 6. Board power sockets and terminals, two ways of connecting power are convenient and flexible. After the power is connected, the relay can remain set even if the computer is turned off or the USB is unplugged from the computer. Specifications: Item Type: Relay Control Style: 1 2 4 8 Channel (Optional) Material: Electronic component Size: approx.1Channel: 56x25mm / 2.20x0.98in / 2 Channel: 57x41mm / 2.24x1.61in, 4 Channel: 72x65mm / 2.83x2.56in, 8Channel: 72x65mm // 2.83x2.56in Color: As Shown Input voltage: DC 12 V Input current: more than 300mA Wiring method: NC / COM / NO Quantity: 1 Pc Note: No retail package. Transition: 1cm = 10mm = 0.39inch. Please allow 0-1cm error due to manual measurement. Pls make sure you do not mind before you bid. Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you Package Includes: 1 xRelay Control (other accessories demo in the picture is not included.)