The Portable HD DVR would fall under the "Electronics" category, specifically under "Car Electronics" or "Car Accessories". Here are the detailed attributes for the product:

Key Attributes

Industry-specific attributes:

• Car Fitment: Universal
• Angle: 120°

Other attributes:

• Type: DASH CAM
• Screen Size: 2.2"
• Voltage: 12-24v
• Working Temperature Range: -30 - 45 ℃
• Model Number: h198 car black box