Specification Brand : FILFEEL BulletPoint1 : [User, friendly Design] Featuring programmable keys and a convenient reset function, this module is a practical choice for users with diverse needs. BulletPoint2 : [Versatile Application] With 2, way 5v relays and large capacity, this module is suitable for controlling various loads with ac250v or dc30v or less. BulletPoint3 : [Mature and Stable Performance] This module supports i or o port, uart program download port, programmable keys, and reset keys, ensuring and efficient . BulletPoint4 : [Ideal for Smart Home] The relay module is for secondary development learning, smart home automation, and Cordless control systems. BulletPoint5 : [Enhanced Security Features] Equipped with and ble modules, this relay board provides a secure and harmless operating environment for the user. ExternallyAssignedProductIdentifier1 : 0744299787593 ExternallyAssignedProductIdentifier2 : 744299787593 IncludedComponents : 6ES7223-1BL32-0XB0 ItemName : 4M Byte Flash Programmable Keys Relay Module with and BLE Modules, AC250V DC30V, Suitable for Smart Home, Cordless Control Learning ItemPackageDimensions_Height : 4 centimeters ItemPackageDimensions_Length : 15 centimeters ItemPackageDimensions_Width : 10 centimeters ItemTypeKeyword : io-modules Manufacturer : FILFEEL ModelName : FILFEEL0oghwn6us4 ModelNumber : FILFEEL0oghwn6us4 NumberOfItems : 1 PartNumber : FILFEEL0oghwn6us4 ProductDescription : [User, friendly Design] Featuring programmable keys and a convenient reset function, this module is a practical choice for users with diverse needs. [Versatile Application] With 2, way 5v relays and large capacity, this module is suitable for controlling various loads with ac250v or dc30v or less. [Mature and Stable Performance] This module supports i or o port, uart program download port, programmable keys, and reset keys, ensuring and efficient . [Ideal for Smart Home] The relay module is for secondary development learning, smart home automation, and Cordless control systems. [Enhanced Security Features] Equipped with and ble modules, this relay board provides a secure and harmless operating environment for the user.