Note: Add only mineral water to the spray. Avoid adding essential oils, hydrosols, viscous liquids, or any substances that may affect water density, as this can lead to poor atomization, visible droplets, or nozzle blockage. When filling, do not overfill to ensure optimal performance. For other uses, you may experiment with perfume or milk, but adjust the ratio accordingly. A 10:1 ratio is recommended.What you get: Four compact nano facial sprayers in assorted colors. Their small and lightweight design fits easily into handbags, purses, pockets, or wallets, allowing for convenient portability. Use anytime to refresh and cool your skin. Simple operation with a push-button onoff switch.Effective functions: Utilizes advanced technology to produce a fine mist that absorbs quickly, penetrates skin, and helps open pores for effective moisturizing and soothing. Helps refresh the skin and remove surface impurities and residual makeup.Stay refreshed: Delivers a cooling mist to soothe dryness and provide relief from environmental exposure. Ideal for use in warm weather to promote a refreshed feeling and maintain hydration during dry winter months.Simple to use: Fill with water, press the button, and enjoy a continuous, soothing mist. This USB rechargeable nano facial mister is designed for long-term use and convenient hydration at the office, during travel, outdoors, or at home.