the Wood Diffuser is Suitable for Indoor Use & Can be Used Before Bed, While Practicing Activities Such as Yoga, Beauty Care or Meditation. This Diffuser Does Not Need to Add Water, Just Drop a Drop or Two of Essential Oil or Perfume on the Diffuser, Which is Convenient & Practical. the Aroma Diffuser is Small & Compact, Which Can Easily Store & Absorb the Fragrance of Essential Oils, While Slowly Diffusing the Fragrance. an Essential Oil Diffuser is a Great a Friend or Family Member Who has Trouble Sleeping or is in a Bad Mood, & Makes a Great Holiday Keepsake.