Working Temperature: 10 to 40 C Enables operation in cold and warm environments, supporting both outdoor and indoor use without special precautions. Lithium Battery: 25 hours of continuous use Provides extended runtime for long sessions between charges, helping to reduce interruptions. TF Card Expansion: Expandable to 512GB Lets you store more content directly on the device, reducing the need for external transfers. Battery Capacity: 260mAh Indicates the energy capacity of the internal power source, contributing to the stated runtime. 23 practical use scenarios Outdoor field use in variable temperatures Operate reliably in environments from cold to warm, making it suitable for field notes, recording, or data collection where power access may be limited. Travel or event coverage with long sessions The combination of long runtime and expandable storage supports extended sessions on the go, such as conferences, workshops, or travel logging, with ample space for media. Content storage and quick transfer When you need more space for media, documents, or data, add a TF card up to 512GB to expand capacity and simplify file management without swapping devices.