PH-44, Dual-Sided Lightweight Headset, 6' (18M) Cord, A5M ConnectorThe Telex PH-44R5 is a lightweight, binaural intercom headset with a dynamic, noise cancelling boom microphone, and a lightly padded adjustable headband. The semi-rigid gooseneck microphone boom is fully adjustable and easily positioned, and the earpiece features a moleskine covering for a comfortable and secure fit. The headset cable connector is a 5-pin male lightweight design. Adjustable, lightly padded headband. Noise-cancelling dynamic microphone on adjustable gooseneck boom arm. Comfortable and durable Moleskine covering for earpads. Specifications: Color Black Connector Options A4F, A5F, Dual 3. 5mm, Stripped Wire, A4M, A5M, A6M Cord Length 6 ft (1. 8288 m) Impedance 300 O Microphone Impedance 200 ? Microphone Sensitivity -65 dBV/Pa Microphone Type Dynamic Noise-Cancelling Sides Dual-Sided Speaker Dynamic Speaker Sensitivity 109dB SPL/mW Weight 3 oz (85. 05 g)