Ready to use, weatherproof, no messy mixing animal repellent. Single application (placing of units) lasts the entire growing season, with no reapplication to be needed. Tamper-proof, nontoxic, and environmentally safe. No odor to humans, but to deer it is the smell of danger. Safe-to-use and protects bed plantings, shrubs, and vegetable gardens. Stakes in the ground or hangs on tall plants and vegetables. Dark green color blends with plant foliage. Place units 8 feet to 10 feet apart. 6 units per package.