Specification Brand : Respicefinem BulletPoint1 : Pulse Generator: This pulse generator can generate square with about 50% output duty cycle. BulletPoint2 : One Way Outputs: Designed to have one way signal output and works stably under 5‑12V voltage. BulletPoint3 : Easy Adjustment: You can adjust the on board resistor to control the output frequency, very easy. BulletPoint4 : Indicator Light: Onboard power indicator can clearly show the working status for convenient using. BulletPoint5 : Easy to Install: Light in weight and compact in size as well, the installation is very simple. Color : Black ExternallyAssignedProductIdentifier : 7669570062851 IncludedComponents : Signal Generator ItemName : Respicefinem Pulse Generator Module Adjustable Frequency 1 Way Signal Output NE555 Chip for DIY ItemPackageDimensions_Height : 1 centimeters ItemPackageDimensions_Length : 8 centimeters ItemPackageDimensions_Width : 5 centimeters ItemPackageQuantity : 1 ItemTypeKeyword : function-generators Manufacturer : Respicefinem MeasurementAccuracy : 0.01Hz ModelNumber : Respicefinemqnxh7woz3d NumberOfBoxes : 1 NumberOfItems : 1 PartNumber : Respicefinemqnxh7woz3d ProductDescription : Item Type: Pulse Generator Module Chip: Onboard NE555 Chip Working Voltage: 5~12V Board Size: Approx. 29 x 12mm / 1.14 x 0.47in