1. Material: Alloy 2. Input: 100-240V 50/60Hz 3. Output: DC 17.6V/12A (each 17.6V/4A) 4. USB output: DC 5V/3A (branch 1.5A) 5. Size: 10.9 x 16.2 x 3.6 cm 6. Net weight: National regulations (801g) Australian regulations (811g) American regulations (791g) British regulations (861g) European regulations (807g) 7. Total weight: National standard (872g) Australian standard (883g) American standard (863g) British standard (932g) European standard (878g) 8. Charging time: about 65 minutes to fully charge 3 batteries 9. Power supply specifications: there are national regulations, American regulations, European regulations, British regulations and Australian regulations