This device is a dual cassette player from the Onkyo brand. Here are some technical details for this model: Playback Features: Supports Auto-Reverse for both sides (Deck A and Deck B), in addition to control. Sound: Features sound recording with Dolby B and Dolby C noise reduction systems. Additional: The device allows copying tapes at normal or high speed, in addition to synchronizing recording with devices. It operates on a 4-track, 2-channel stereo system, with a tape speed of 4.8 cm/s. Note: No speakers, do not test it.