Check the listing for details. Telex PH88 Single-Sided Lightweight Headset with A4F Connector. Color: Black, Condition: New. Listed at 229.00 USD. A single-sided and super-lightweight headset, the PH-88 from Telex offers the ultimate in daylong wearing comfort. It features a dynamic noise-canceling gooseneck microphone with a semi-rigid, fully-adjustable boom for precise positioning. The unit's high-quality wide-band dynamic earphones are covered in moleskin for exceptional fit, isolation and frequency response. Please note: this particular unit comes with an A4F connector.SpecificationsColor: BlackConnector: A4FCord Flexibility: Coiled or straightCord Length: 6ft (1.8288m)Impedance: 300 ΩMicrophone Impedance: 200 Microphone Sensitivity: -65 dBV/PaMicrophone Type: Dynamic Noise-CancellingSides: Single-SidedSpeaker: DynamicSpeaker Sensitivity: 109 dB SPL/mWWeight: 2.5 oz. (70.87 g)Note: further information can be found within the "PH88 Datasheet" located under the "Documentation" tab above.