Features Relay Board: QF-021-45S is a compact trigger delay disconnect module, which is often used in delay lights out and industrial control circuits. Supporting 0-45S delay adjustment, this timing relay has high performance according to strict regulations. Practical: The relay module adopts NE555 monostable circuit scheme, which is easy to use in real life. If you need the module to work repeatedly after power on, please connect 2 Key lines. Wide Voltage Use: For 100-240V wide voltage use, this relay is made of high-quality materials and is a timing relay module with high precision, stable and reliable performance. High Quality: After many inspections before leaving the factory, the quality is guaranteed, you can use it with confidence. If you need the module to work immediately after power up, connect two triggers. terminal. Scope of Application: Widely used in timer operation equipment, household appliances, lighting delay modification, factory equipment, delay control, etc. Specification: Item Type: Relay Technical Indicators: Working Voltage: AC 100-240V wide voltage Delay Range: 0-45 seconds adjustment Minimum Delay Time: 0.5 seconds Load Capacity: 10A Package List: 2 x Relay  Package List 2 x Relay