The Inhalater is meant to be used with a completely dried and grinded blend. The temperature setting can vary from 1-9, 1 being the lowest temperature. To achive thicker vapor increase temperature gradually. The Inhalater has an auto shut-off feature that will trigger after 6 minutes, however you may shut it off at any time by turning the temperature control to 0. To recharge simple plug the micro-USB supplied power cord, a green indicator light will come on until the battery is completely charged. Recharging time is about 5 hours on a fully discharged battery. When fully discharged, you must wait 30 minutes before you can use the inhalater while charging. Charging ratio is 6:1. 6 minutes of charging are necessary for 1 minute of operation.