["Features:\r\nThis module uses MCU as the main chip.\r\nHigh timer precision.\r\nMCU watchdog circuit and special reset chip.\r\nStable and reliable work.\r\n\r\nSpecification:\r\nT1(the relay turn on delay for time), T2(the relay turn off delay for time) \r\nOnce mode (Jumper OP3)\r\n1. The module Power-on, When triggered the relay is switched on, delay T1, and the relay disconneted.\r\n2. When triggered on the delay process, again triggered, it will immediately interrupt the delay.\r\n\r\nCycle mode(Jumper OP4)\r\n1. The module Power-on, When triggered the relay is switched on, delay T1,and the relay is disconneted, delay T2, \r\nthe relay is switched on again. Such cycle. T1 and T2 are set by two adjustable resistors, respectively.\r\n2. When triggered on the delay process, again triggered, it will immediately interrupt the delay.\r\n\r\nTypical application reference:\r\n1. timer operating equipment, such as each press for key trigger,when reach 5 minutes the automatic power off.\r\n2. machine repeat test circuits, such as power 1 minutes on and then power off 1 minutes of ,such a cycle\r\nof testing.\r\n3. fish for tank pump intermittent pumping oxygen.\r\n4. other timer control equipment.\r\n\r\nPerformance:\r\nJumper OP1: 1 to 100 seconds, 0.1 seconds of regulation accuracy\r\nJumper OP2: 1 seconds to 15 minutes, 1 seconds of regulation accuracy\r\nThe for time delay error of all kinds of temperature and humidity is not more than 2%\r\n\r\nSize: 7x2cm/2.76x0.79inch\r\nQuantity: 1 Pc\r\nNote:\r\nPlease allow 1-3mm error due to manual measurement. pls make sure you do not mind before you bid\r\nDue to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you!\r\n\r\nPackage Contents: \r\n1 x Infinite Cycle Delay Timer Relay"]