The Hitachi DA-P100 is a portable CD player that operates on a.c. power, internal batteries, or can be connected to a 12-volt automobile battery using an optional adapter. Slightly larger than the smallest portable models, its dimensions are approximately 7.5 inches wide, 6.375 inches deep, and 1.625 inches high. Weighing around 2 pounds and 10 ounces without batteries, it has an LCD display that indicates the current track number, the playing time, and the operating status, including play, pause, repeat, and battery condition. Control buttons allow for play/pause, stop, track skip, and fast search. Additionally, it features a sliding power switch, headphone jack, and tone controls for adjusting sound output. The back includes power and line-out jacks, while a removable cover provides battery access. Performance specifications reveal a noise level of -90 dB, distortion at 0.008%, and frequency response of 20 Hz to 20 kHz. With fresh alkaline batteries, it offers about 2.5 hours of operation. The player is sensitive to impacts, making it more suitable for stable environments than for mobile use. Though it lacks advanced programming features, it is ideal for home music systems and offers performance substantially superior to most analog players.