The D'Addario Humidikit all-in-one humidification maintenance and monitoring system gives you everything you need to ensure your instrument stays safe and playable. The system includes a D'Addario Humiditrak with Blustream Technology to provide a constant stream of temperature, humidity, and impact data directly to your smartphone via Bluetooth.* It also contains a Humidipak Starter Kit, featuring Boveda's patented two-way automatic humidity control technology, to maintain the ideal humidity level inside your instrument case. Whether your instrument is across the country or at your fingertips, you can rest assured that D'Addario's Humidikit is giving your instrument the complete care it deserves. "D'Addario Accessories promise to be the most innovative professional musician's tools available. Our Humidification line is no exception. From simple sponge style humidifiers to the patented Humidipak Automatic Humidity Control System, D'Addario has all the tools you need to keep your instruments perfectly humidified. "