Melodysusie thick gel：Only a thin layer of gel is needed for perfect coverage. If you apply too much gel, you will need to cure it under UV light for 30+s.The brush is ergonomic and provides smooth coverage, not only suitable for professional nail salons, but also for beginners. For a small fee, you can get professional salon-style manicures at home! Curied with UV Led Nail Lamp: This is UV gel. It must be used with UV light, a base coat and top coat! This item does not include base&top coat, which needs to be purchased separately. Average UV LED light curing time 90-120 secs. Health-Conscious & Low Odor: Prioritizing your health, our gel nail polish is formulated with a toxin-free ingredient list, reducing the risk of nail damage and keeping the odor minimal.