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Check the listing for details. Relay Module Control Board Delay Electronic Switch Controller For PC LED. Condition: New. Listed at 24.50 USD. Feature: 1. When input is detected, the relay is closed. After the disappears, the relay delay ( from 0.1 to 9.99 seconds) is disconnected, which is easy to operate. Item Type: Relay Module. Note: For iOS 7 and above series need conversion head.