The "Bluetooth-Compatible Mini Thermal Printer" you described is a portable and versatile printing device that utilizes thermal printing technology. Here are the key features and details about this printer:

200dpi High-Resolution Printing: The printer features a 200 dots per inch (dpi) high-resolution print head. This results in clear and sharp printing output, making it suitable for various printing tasks.

Wireless and Bluetooth-Compatible: The printer is equipped with Bluetooth connectivity, allowing it to connect wirelessly to compatible devices like smartphones or tablets. This wireless feature provides convenience and flexibility in printing.

Portable and Compact: The printer's compact size and portability make it easy to carry and use on the go. It's suitable for situations where you need to print while traveling, at events, or in the field.

Versatile Printing Functions: This thermal printer supports a variety of functions, including the ability to print photos, labels, messages, lists, QR codes, web pages, and more. This versatility makes it a useful tool for both personal and professional use.

Specifications:
Product Name: printer
Material: ABS+PC
Paper Type: thermal paper
Connection Method: /USB
Input: 5V, 2A;
Battery: 3.7V, 1000mAh
Paper Width: 57mm
Roll Diameter: 25mm
Resolution: 200DPI
Version: 4.0

Package Includes:
1 * Printer, 
1 * USB Data Cable, 
1 * User Manual, 
1 * Thermal Paper,
1* Packing Box