Specifications:Power Supply: AC (-) 90V -240V, DC 6V 4 batteries UM-2 C cell typeSpeaker: 3” 8ohmOutput: 850 mW maxCassette Section:Tape: Standard Cassette Tape (lengths C-90 or less)Tape Speed: 1-7/8 in/sec. (4.7 cm/sec)Frequency Response: 200-6,300 HzErasing System: DC EraseRecording Bias System: DC BiasContinuous improvements are always being made to our equipment,both in quality and performance, therefore we reserve the right to alterspecifications without notice.