The BOSS BP-1W is a high-quality booster/preamp with adjustable level and gain. - Model: BP-1W - Type: Booster/Preamp - Features: Level adjustment, Gain adjustment - Accessories: Original box - Brand: BOSS - Waza Craft: Waza Craft series Thank you for viewing. This is a used item I purchased earlier this year. I am selling it because I acquired the original BOSS CE-1 and no longer need it. The RE and CE selector settings are very close to the sound of the legendary units and I found them very useful. This is recommended for those who can't afford the original but admire the tone of famous guitarists. * Although it looks yellowed in the photos due to the lighting, it is actually pure white.