Electric Black, Grey Lava-look Fragrance Oil Warmer with Free Fragrance Oil Great Home Decor Enhancement_Black, Grey Lava-Look Fragrance Oil Warmer Add 20 drops of your favorite fragrance oil or tart melts. Comes with Free Dram of Oil Can function as a night light, and can be used with either Oil or Melts Operates with Touch mechanism.. No Switch (Modern style). Just Touch the base to turn the lamp on and off