Specification Brand : Lighthouse LEDs ItemName : 5mm Round Top Red Fast Flashing 2Hz LED - Super Bright (Pack of 10) ItemShape : Round ItemTypeKeyword : super-luminescent-leds LightColor : Red Manufacturer : Lighthouse LEDs Material : Copper MaximumVoltage : 2.1 volts ModelNumber : 5MMROUNDTOPFLASHINGLEDRED2HZ NumberOfPins : 2 PartNumber : 5MMROUNDTOPFLASHINGLEDRED2HZ ProductDescription : Now in one of the most popular sizes, we have brought a flashing led. The 5mm flashing round top red led will automatically start flashing once it is appropriately hooked up to power. There is nothing extra needed when hooking this led up to power. A power source, led, and resistor is all you need. 2hz = 2 cycles per second or about 120 times per minute. It will flash on and off 2 times each approximately per second. We consider this a “fast� flashing LED. The frequency is approximate.We use and have only the highest quality leds out there. ProductSiteLaunchDate : 2015-11-10T07:00:44.203Z Size : 10 Piece UnspscCode : 32111500 WavelengthRange : 620-630nm