Weighing only 8.1oz, the Pioneer burner can be powered directly via USB (no AC adapter required). The ultra-compact USB 3.0 Blu-ray player allows you to read and write to all BDXL discs (BD-R triple-layer 100GB media, BD-R quad-layer 128GB media, and BD-RE triple-layer 100GB media) as well as Blu-ray discs. One of the World's Smallest & Lightest Blu Ray Player - This BD/DVD/CD external 4K Ultra HD optical drive & burner is one of the smallest & lightest in the world, supporting BDXL and M-DISC.