ACM-01 Audio Details Technical Specifications PTT & MIC Water Proof Cable (for use with receive-only Earpiece)IP54 compliant base set with PTT button and microphone can be used with a range of Hytera earbuds. The 3.5mm jack enables the replaced earbud to be connected directly to the ACM-01.Find a dealerHighlightsFunctionsTechnical SpecificationsMicrophone sensitivity -45dB ± 3dB @1KHz, impedance ≤ 2.2KΩ @1KHz, PTT Cycles PTT cycles ≥100000, operating temperature -20°C to +60°C, IP54Related Products BD612i Two-Way DMR Radios PD482i UHF/VHF Two-Way DMR Radio BD5i Series