The Speidel GÄRSPUNDmobil Fermentation Monitor is perfect for homebrewers and fermentation enthusiasts. You can use it at home to keep an eye on your beer, wine, or other fermentation projects right from your computer or phone. It's easy to use - just place it on your Speidel airlock. It has a simple light to show its status and comes with a USB cable. The monitor uses the common IEEE 802.11 b/g/n network standard for wireless connection.