- Super bright LED with a sturdy, unbreakable shell and an improved lighting design for practical use and long service life. The battery is replaceable, so the light can be reused over time. - Comes with a keychain: popular keychain design, LED light bulb with a push button for easy and quick operation. - Small and lightweight: 41 mm long, 23.5 mm wide, 9 mm high. Easily carried on a keychain or in a pocket without adding noticeable bulk. - Purple light mode: suitable for dark areas and for checking the authenticity of money. Useful for camping, hunting, hiking, and emergency situations. - Practical use scenarios: - Outdoor activities: carry on your keychain for camping or hiking at night, providing quick lighting exactly when you need it. - Emergency preparedness: use during power outages or in low-light situations as a compact backup light. - Currency and document checks: use the purple light to inspect money and related items for authenticity.