Thank you for looking at the product. 23 hours? Tape playback: Approx. 15 hours (at volume 23)? CD playback: 10 hours at approx. Volume 23? Actual usage time may vary depending on usage environment and conditions. Audio input (sound input):? (stereo mini)? Headphone output:? (stereo mini)? Power consumption during AC: Approx. 11W? Power consumption during AC (when power is off/on): Approx. 1 W? Power source: Attached power cord, optional AAA batteries x 6? Maximum external dimensions: approx. (W)310 x (H)140 x (D)212 (including projections)? Weight: Approx. All my products are 100% Authentic. Please check the image for the condition of the product. International Buyers – Please Note. Thank you for your understanding.