One-handed, cap-free retractable tip: The telescopic pen tip extends and retracts with one hand, eliminating the need for a removable cap and the risk of losing it. Ideal for quick use on the go or when you need to switch tasks fast. Clear, professional design with reliable ink protection: The transparent pen barrel looks modern and lets you monitor ink level. A high-airtight sealing structure prevents ink from drying out or leaking during storage or travel. Consistent, bold medium nib performance: The medium nib and precise ink regulator deliver smooth, even lines for signing documents, filling forms, or everyday writing. Writes consistently without skipping or blotting. Refillable and resource-conscious: Includes 5 blue ink refills and supports repeated refilling for long-term use. Reduces waste compared with disposable pens while keeping the convenience of ready-to-use refills. Comfortable for extended use: An ergonomic grip area follows the hand’s natural curve to reduce fatigue during long writing sessions, making it easier to write clearly for longer periods. Key specifications and features: Retractable telescopic pen tip (one-hand operation) Transparent barrel (visible ink level) High-airtight sealing to prevent drying and leaks Medium nib with precise ink regulator for consistent lines Includes 5 blue ink refills; supports repeated refilling Ergonomic grip for comfortable, long-lasting writing Practical use scenarios: Signing contracts and official documents where a bold, reliable line matters. Note-taking in meetings or classes where quick, cap-free access saves time. Travel and everyday carry for journaling, forms, or general use without worrying about ink leaks or lost caps. What you get: a retractable, refillable pen with a medium nib, five blue refills, airtight sealing, and an ergonomic design for dependable everyday writing.