KNACRO 4-Channel 12V USB Control Switch Relay Module No Driver Required Plug and Play PC Smart Controller

Input voltage: DC 12 V; Input current: greater than 300mA; Wiring method: NC / COM / NO; Relay parameters: Maximum control AC 250V, 10A AC load and maximum DC30V 10A DC load; Module Application: Home intelligent switch control; Hotel intelligent switch; Hotel intelligent electrical control; Intelligent greenhouse; Shopping malls intelligent switch; Company plant intelligent switch; Internet cafes regular management; Karaoke timing control; Networking; Industrial equipment; Test equipment power control; Street lamp management; Intelligent management; Centralized power management; Package Inluded: 1*4-Channel 12V USB Control Switch Relay Module