Specification: Marine, Cologne, Lemon, Rose, Lavender Material: Glass Dimensions: Approx. 23x46mm/0.91x1.81'' Ingredients: Essential Oil How to use: 1. Open the bottle, remove the inner plug, lemon wood tight lid 2. Place the bottle upside down for 2 seconds, then hung on the car Fragrance time: 1. This product is fragrance long and up to 90 days 2. This product can not be given to children under 6 years old to play