Innovative Humidity & Temperature Guitar Monitor Easily Clips Directly onto Your Acoustic or Electric Guitar Strings The Accurate Sensor Monitors Your String Instrument's Environment Every 20 Seconds and Gives You the Humidity and Temperature Readings on Its LCD display Gives You the Maximum and Minimum Humidity & Temperature Range Over the Period You Are Measuring and Can Be Reset at Any Time Works Great to Monitor all Guitar Humidifiers, even 2-Way Humidity Packs. Own a MusicNomad Humitar Humidifier(sold separately)? HONE Can Replace the Lid and Snap In Comes with Many Other Cool Features Such as a Reminder of the Humidity and Temperature Safe Zone You Want to Keep Your String Instrument at, a Long-Lasting AG 13 Battery, and Fahrenheit or Celsius Readings