This 19" (0.5m) long high performance 'Fatboy' antenna provides excellent reception. Fatboy antenna is considered very good. IronMan antenna is the best.
Need improved signal strength and reliability? Try this high performance 'Fatboy' antenna. It's thicker and has better connectivity than the stock antenna that ships with the sensor. It's more expensive, which is why Simtek offers it as an optional accessory. It does not have a magnetic base like the original antenna that comes with your sensor, however it does have a threaded washer, which allows you to secure it in place tightly.