ES-01 Audio Details Technical Specifications Earbud without Earpiece (Receive-Only)Reliable and ergonomically designed earbud to be used with various base sets. 3.5mm jack plug.Find a dealerHighlightsFunctionsTechnical SpecificationsSpeaker sensitivity 110dB ± 3dB @ 1KHz, rated power 10mW, maximum power 30mW, impedance 32Ω± 15% @1KHz, operating temperature -20° to +60°CRelated Products PD662i UL913 PD982i UL913 PD682i UL913 PD602i UL913