?NOTE: The 1-Channel 2-Channel module does not require an external power supply. 4-Channel 8-Channel modules require an external module power supply. ? Product parameters: Input voltage: DC 5 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; Package Inluded: 1*1-Channel 5V USB Control Switch Relay Module

https://1drv.ms/u/s!AlzQUCOyZQhKgWS7uH0cskD7GHlD?e=wecwdX. NOYITO USB Relay External Use Development Library Test app Download. PCB size: 56.5mm * 24.9mm, fixed hole size: 3mm, fixed hole center moment: 52.2mm * 20.6mm. ?NOTE: The 1-Channel 2-Channel module does not require an external power supply. 4-Channel 8-Channel modules require an external module power supply. ?. Power outlet and terminal, two access power mode convenient and flexible. After connecting the power, even if the computer shut down or USB from the computer pull out, the relay can also maintain the set state. Onboard square USB interface, stable connection; use of high-performance USB control chip; use dedicated relay driver chip ULN2803, relay work more stable;. The module uses HID technology, without any driver, plug and play. Support WIN10, 7, XP 32-bit, 64-bit system, easy to use simple.