SONY CD Walkman D-E404. Color: Silver [Product Features] ・Built-in ESP, so there will be no skipping or playback interruption even if you tap the body during CD playback. ＊ESP Explanation: Audio data from the CD is stored in semiconductor memory for several tens of seconds in advance. This technology sequentially outputs the audio data stored in this memory to a D/A converter and outputs it via a HP amplifier. [Included Items] (All items are shown in the first photo) ① D-E404 Body ② Stereo Earphones (Third-party/New) ➂ AA Alkaline Batteries (New) x 2 ④ Instruction Manual [Operation Check] ＊Checked with 2 AA alkaline batteries installed ＊ESP = ON setting Played a music CD (17 tracks, approx. 72 minutes) with few scratches on the signal surface and confirmed the following items. As a result, everything is working normally. ① Does it play without skipping during normal operation? ② Does skipping between Track 1 and the last track occur without any lag? ➂ Do all the switches on the main unit function properly? ④ Does skipping occur when lightly tapped 5 times in a row during playback? [Continuous Playback Time Confirmation] Confirmed continuous playback time = 18.5 hours under the following conditions. ① Installed 2 new AA alkaline batteries ② Attached the included remote control and stereo earphones ➂ Played a commercially available CD with approximately 72 minutes of music in all-track repeat mode (volume set to 1/3 of the maximum value) [Appearance] Top of the main unit: No noticeable scratches or stains. Bottom of the main unit: No noticeable scratches or stains. Sides of the main unit: No noticeable scratches or stains. Accessories: No noticeable scratches or stains.