The Prankster AVR USB. However, this isn’t being marketed like your typical AVR device. It is being marketed as a pranking device. The device is pre-flashed with code that turns on an off the capslock key every 5-20minutes, thus pranking whoever the device is used on. However, anyone that buys this device can easily erase the Prankster AVR’s flash and flash it with what ever hex code they want. This is definitely one of the more unique and interesting marketing campaigns when it comes to the reprogrammable USB devices that have been coming out.