SD28 Diagnostic Audiometer Supplied with : TDH39 B71 Patient Response Switch Mains lead BS IEC Carry Case Operators manual in pdf Fully tested and working fine Technical Specifications Channels 2 separate and identical channels Pure tone frequencies AC and SP: 12 standard 125 - 8000 and 12500 Hz BC: 250 – 8000 Hz standard frequencies Accuracy: Better than ±1 %. Modulation FM (Warble): 1 - 20 Hz in 1 Hz steps. Mod.
Used only few times to label household wires. The unit is in excellent cosmetic and working condition. New cost was $285 The Professional Labelling Kit!
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