This is a VOX pedal-type tuner. I bought it new and used it at home. I have confirmed that it works, and there are no problems. There are some minor scratches, but I think it's generally in good condition. The main unit comes with the original box and instruction manual. This high-precision tuner can be used for both guitar and bass. It features an ultra-high-precision strobe mode, and the low-frequency response is particularly good, reacting quickly and accurately even to the low B string of a 5-string bass. It's true that the response speed is fast, perhaps because it shares the same circuit with KORG, with whom they have a technical partnership. Velcro is attached to the back, so you can immediately use it by incorporating it into an effects board. This tuner consumes only about 10mA depending on the display mode, so you can use it for a considerable amount of time with a single 9V battery. Therefore, I think it's a very easy-to-use model even if you don't have a power supply, etc. Also, I personally found the true bypass specification very helpful, and the ability to supply power to other effects from the DC OUT was also convenient. The offset tuning is also highly rated. Also, it looks very cool when placed alongside other VOX models (such as the Valve Energy series). Please understand that this is a used item before purchasing. The following is a reprint of the product description. Features VOX pedal tuner with an easy-to-see display. Built-in offset tuning mode that provides a harmonious sound according to the instrument and temperament. Equipped with a DC output that allows parallel output, and can supply 9V 200mA of power from this unit to other pedals. Specifications ■ Tuner for guitar/bass ■ Temperament: 12-tone equal temperament (offset = chromatic) 10 other offset tuning modes ■ Measurement accuracy: ±0.02 cents (variable depending on the mode) ■ Power supply: 9V dry cell battery or AC adapter (center minus 9V) ■ Battery life (tuner on, A4 continuous input, display mode: strobe): When using manganese dry cell batteries: Approximately 12 hours When using alkaline dry cell batteries: Approximately 24 hours ■ Maximum current consumption: 20mA (variable depending on the mode) ■ External dimensions (W x D x H): 65mm x 120mm x 53mm ■ Weight: 309 g (including batteries)