In Knives Out, the ability to "flick" your fingers when shooting is considered important. This is a switch that allows you to accurately tap for that finger flick. This is a two-shot finger flick (there is also a one-shot finger flick). Recently, "rapid-fire devices" have become popular, but unlike rapid-fire devices that just tap, this device is programmed and set up by dividing the length of time the tap is pressed and the length of time before releasing and pressing again into two systems. Also, as it is a new model, it is installed on the screen, similar to normal operation. MicroUSB is required for power supply. This product is developed, manufactured, and sold by our company. If you need more details about the product, please search for "automatic finger flick" on SNS. Also, it can be used for games that tap the smartphone, such as Apex, COD, and PUBG. This is a must-see for those who need a mechanical shooting button. (Since the settings are for Knives Out, we do not guarantee no recoil.) *The product to be delivered is the latest version and is being improved daily, so not everything is the same as the image. Please check the latest version on Twitter. *There is a risk of violating the terms of service of each game, but we are not responsible for anything. Please do so at your own risk. *We have not confirmed the operation of iPhones and Androids, and we do not guarantee their operation. Please tell us in the chat after purchase whether you want a one-shot or two-shot.