BOSS TU-2 Chromatic Tuner with bypass function, 9V battery compatible. - Model: TU-2 - Type: Chromatic Tuner - Connections: INPUT, OUTPUT - Features: Bypass function - Power: 9V battery No box, no accessories. Thank you for viewing. I'm selling this because I don't use it. I tried it out for about an hour, turning it on and off. It's been a year since I last used it, and the first time I turned it on, the sound was quiet for about 5 seconds before gradually returning to normal. However, when I turned it on again 2 to 10+ times, it worked normally. I'm not sure if the problem is with the tuner or the cable. Please purchase only if you are okay with this condition.