... 3.5Phone jack, audio video jack, power jack. Used in TV,DVD,mp3 1.This specification covers the requirement for 2.5 earphone Jack. ... (Figure) ≤50mΩMechanicalefficiency7.4Insertion andWithdrawal forceStandard gageΦ2.5±0.05Apply the standardEIAJ RC 6701A.JISC6560Insertion force≤29 ... ΩInsulation resistance: ≥10MΩno difference normally workingmechanic scathe 3.5Phone jack, audio video jack, power jack