The Gravity RC 1/10 Off Road Tire Tube is a truly unique accessory for the performance conscious racer. Featuring a humidity and temperature sensor built in to the cap, as well as a separate humidifier, this tire tube will help to keep your tires fresh and ready for action. The sensor in the cap will display the humidity and temperature inside the tube, and shows the temperature in Fahrenheit or Celsius measurements. The humidifier uses hydration beads to distribute the moisture. Package includes tire tube with info label and sensor cap, humidifier, moisture beads, battery and instructions.