Size:1 pcs 3.5MM to RJ9 crystal headProduct use: Headphones with round head are converted into earphones with crystal head interface, used on the phone, compatible with a plug phone headset / computer headset to telephone headsetTips: Because the power and impedance of ordinary computer headsets are relatively low, there is still a certain gap compared to professional telephone headsets. Friends who pursue high quality effects suggest that it is better to choose professional products.Due to the inconsistent production standards of the telephone, this product is not suitable for all branded telephones (can be compatible with about 90% of telephones). Please kept informed!--------------------------------------------------------Package Including1 x Headphone conversion line or2 x Headphone conversion line
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