The aiwa TP-M370 is a silver cassette player equipped with the SLSS system. - Brand: aiwa - Model: TP-M370 - Features: SLSS system - Color: Silver - Condition: Open function available Thank you for viewing. I am selling this because I no longer use it. I checked its operation for the first time in a year, and confirmed it works with batteries. Since I don't have a cassette, I couldn't check the sound quality. There was noise in the earphones, so output is present. It can be used immediately by inserting AA batteries.