【Overview】 This is a set of two units. Both are in similar condition. These units are Pioneer CDJ-800mk2, a club standard. These are used items in good condition that have been cleaned, had parts replaced for preventative maintenance, and undergone other maintenance. 【Why We Recommend This】 This is a standard piece of equipment that you'll find in any booth. In venues where Pioneer equipment is common, getting used to this CDJ will allow you to DJ without any problems, even with the latest CDJ models. After maintenance, I mixed for about an hour using CD-Rs. I was able to use it comfortably without any problems. While not many people use this equipment for serious scratching, Pioneer's time stretch sound is good, so you can scratch with confidence. The touch sense on the CDJ-800mk2 often deteriorates, but this unit is almost as good as new. CD-R/RW discs can also be played (however, they may not play correctly depending on the disc characteristics, scratches, etc.). The CD read error rate has been measured and is well within the OK range (even if a used CDJ appears to work, it may be judged as NG, and such CDJs are nearing the end of their lifespan). MP3 files can be played. 【Maintenance】 ・Replaced six frequently used panel buttons with new ones (Play, Cue, Track Search +-, Fast Forward/Rewind) ・Removed and cleaned the keytops of all switches ・Cleaned the interior and exterior ・Greased ・Firmware updated (final version; improved CD reading accuracy, improved time stretch sound quality, etc.) ・CD read error rate measured (OK even with heavily scratched CD-Rs) 【Appearance】 The PLAY/STOP and CUE buttons show signs of use, but the rest is generally in good condition. The LCD brightness is high, and I believe the operating hours are low. Please see the images for details. 【Operation】 Maintenance and operation have been confirmed. Ready to use immediately. 【Included Items】 ・Power cord I am a non-smoker. These units have been maintained and their operation has been confirmed as described above. To prevent swapping and due to the age of the equipment, we ask for no claims and no returns, except in cases such as the unit not powering on or if the delivered unit is clearly different from the one in the images. Purchase by others is OK while questions are being answered.