Specifications:Material: PCBWorking Voltage: DC12V/24V Input Voltage: DC/AC7V~27VOutput Power: 30ATime Range: 0.1s~999mins(Continuously Adjustable)Module Size: 9.2 * 8.6 * 2.1cm / 3.6 * 3.4 * 0.8inPackage Size: 14 * 11 * 3cm / 5.5 * 4.3 * 1.2inPackage Weight: 103g / 3.6oz Features:12V/24V 2-Channel relay interface board for easy operation.Equipped with High-current Relay: AC250V 30A and DC30V 30A.With clear LED display, convenient to check the value.Adjustable Time Range: 0.1 second to 999 minutes.Input Voltage: DC/AC7V~27V.Compatible with the programming software for Arduino.