The VOX AP2-BS is a compact bass amplifier, making it easy to carry around. - Brand: VOX - Model Name: AP2-BS - Type: Bass Amplifier Thank you for viewing. I have used it once or twice, but I am selling it because I have no opportunity to use it. Operation has been confirmed. The main unit only. Two AAA batteries are required separately. Please refrain from purchasing if you are nervous as it is a amateur inspection. Immediate purchase is OK. Search terms: Bass Guitar Bass Amplifier Headphone Amplifier vox