The Telex PH-88R5 is a very light-weight single sided RTS 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 moleskin covering for a comfortable and secure fit, The headset cable connector is a 5-pin XLR Male type, Very lightweight design, Adjustable, lightly padded headband, Noise-cancelling dynamic microphone on adjustable gooseneck boom arm, Comfortable and durable Moleskin covering for earpad, Type: Lightweight Single Sided RTS Intercom Headset with Dynamic Noise-Cancelling Microphone, Frequency Range: 300 Hz - 15 kHz, Microphone Type: Dynamic, Noise-Cancelling, Mic Frequency Response: 30 Hz - 10 kHz, Impedance: 150 Ohms(Headphones), 200 Ohms(Microphone), Sensitivity (0 VU): Not specified by Manufacturer, Maximum Input Power: Not specified by Manufacturer, Connectors: 1 x 5-Pin XLR Male(A5M), Cable Length: 6" (1, 8 m), SKU: TBALL9880