Portable hand brush for computers: Bristles extend fully when you press the head upward, enabling quick and thorough dust removal. The compact size is ideal for computers, electronics, and car interiors, and it is lightweight and easy to carry for desk use or on the go. Small cleaning brush: Easy to maintain after use—simply shake and rinse. Lightweight and portable, you can store it anywhere. Suitable for cleaning small areas and delicate components. Dust removal brush: High quality bristle fibers with a large coverage area deliver efficient dust removal for computer and electronics cleaning. Mini cleaning brush for keyboards: Made from durable, elastic wool material with medium hardness, suitable for use on most surfaces and especially practical for cleaning keyboards. Use scenarios: - Clean a laptop or desktop keyboard and chassis at your desk, removing dust from crevices and ports. - Dust interior computer components, such as fans, heatsinks, and case interiors, with the dust removal brush. - Quick dusting and debris removal from car interiors, including dashboards, vents, and electronic panels. Key attributes: - Function: four brushes designed for computers, electronics, keyboards, and small spaces; bristles extend for easy cleaning. - Compatibility: suitable for computers, electronics, car interiors, desks, and various surfaces. - Size: compact and portable; lightweight for easy storage and transport. - Material: durable elastic wool-like material for the keyboard brush; high-quality bristle fibers for other brushes. - Performance: efficient dust removal with large coverage and easy maintenance, including washable after use.