Rechargeable Mode: Built-in rechargeable battery, conveniently generates power for more than 10 minutes of lighting with a 1-minute crank (based on a speed of two revolutions per second). The panel as an emergency power supply method absorbs all kinds of light, such as strong and medium sunlight, lamp light, etc. The sturdy and ergonomic design is comfortable and safe to grip with your hand. Perfect for daily, emergency and outdoor lighting. The built-in durable carabiner securely attaches to your backpack, ideal for outdoor activities. Portable size for door use: 124x45x32mm / 86g. Number of shipments: 1 pcs black.