FMA&FCS AMP Tactical Headset Communication Noise Reduction V60 PTT Upgraded. TIPS: Only headphones can not communicate directly. Need to match OPSMEN and original EARMOR TCA TRI and other military regulations PTT (for NATO connector) Not suitable for elements ELEMENT Z-Tac and other PTT. Please pay attention to options. Headset jack: U-174/U plug. 7 (AAA) batteries can be used for power supply for radio communication, without turning on the power supply or working independently even when the battery is exhausted. (Don’t include Battery). Quick release switch (wearing head/helmet). It is recommended to match FCS V60(not come with headset set) to realize single-line dual-communication radio communication function. Note:not include the helmet and talkie walkie and battery. Single/dual wire dual pass. Up to about 60 hours of battery life. Noise reduction value: 26dB. Impedance characteristics: 32 OHM. PTT interface: U-174 / U socket + 6 pin plug. PTT Compatible PRC-148/152, FCS-148, U94, PELTOR, US military original communication models.