Specification Name:Clip-on ND 2-400 Adjustable Density Filter for Cell Phone Lens Material: Glass Color: Black Diameter: 3.7cm/1.45 inches (approx.) 5.2 cm/2.05 inches (approx.) Features: Ultra-light, durable, reusable, compact size DESCRIPTION ADJUSTABLE LIGHT TRANSPARENCY: Turn your cell phone camera into a solar imaging device with adjustable light transmittance from 2 to 400, easily capture stunning sunlight photos. PORTABLE DESIGN: The device is easy to carry in your purse or pocket, ensuring the convenience of solar imaging anytime, anywhere. PREMIUM QUALITY MATERIAL: Made of quality light-reducing material, it effectively limits light transmission and enhances your sun imaging experience. 2 n 1 USE: the lens filter works with almost all smartphones with clip design. Without a clip, it can also be used with DSLR cameras with a 37mm lens thread. THOUGHTFUL GIFT: Ideal for friends, family, and coworkers interested in astronomy, this device makes a practical and meaningful gift for capturing eclipses and other astronomical phenomena. Product List: 1 x Smartphone lens 1 x Clip 1 x Lens cap 1 x Storage bag