POA42 Audio Details Technical Specifications Covert Wireless Earpiece ReceiverIdeal for covert communication; the wireless earpiece reciever fits in the ear canal and can be used with TETRA portable radios and portable radios in the PD7i, PD9i and X1i seriesFind a dealerHighlightsFunctionsTechnical SpecificationsSpeaker sensitivity 92dB ±3dB @1KHz, operating time 80hRelated Products PD702i UL913 PD602i PD702i X1ei