High quality. Application: Suitable for Smart 12V DIY mini UPS box, widely used for fingerprint attendance machines, fire safety systems, security monitoring systems, wireless cameras, CCTV cameras, door security systems, data assistants, emergency lighting, alarm systems, communication systems, radios, digital cameras, camcorders, video cameras, and other 5V, 9V, 12V devices. Functions as a USB power bank for cellphones, tablets, and other devices. 3-in-1 design, easy to use. Input: 5.5x2.1mm port for DC 12-13V 2A. Outputs: 5.5x2.1mm port for DC 12V 2A max, 5.5x2.1mm port for DC 9V 1A, USB output 5V 2A. Suitable for Wi-Fi routers, LED strips, CCTV cameras, and other 5V, 9V, 12V devices. First, install the 18650 batteries, then press the button on the back of the circuit board to activate the product. Equipped with on/off switch for easy operation. Appearance may vary slightly between batches, but functionality remains unchanged. Power supply: Requires 6 x 18650 lithium batteries (batteries not included). Color: Black Material: ABS Package contents: 1 x DIY Box (18650 batteries not included) 1 x DC cable Note: Only the items listed are included. Light reflection and display differences may cause slight color variations between the image and the actual item. Measurement error allowed is +/- 1-3 cm.