KOSS SATO stereo speakers with volume control switch, 3.5mm jack connection. When powered on with two AA batteries, the front lights up red. There is an on/off switch on the back. Please understand that this item has been previously owned before purchasing. Used condition. Please purchase if you understand that this is an old product from several decades ago. Showa-era retro battery-powered speakers. Batteries are not included. - Brand: KOSS - Model Name: SATO - Type: Stereo Speakers - Switch: Volume Control Switch - Connection: 3.5mm Jack vintage. Vintage. Old item from the Showa era. Thank you for viewing.