1. 24K gold-plated plug, lossless sound quality. 2. Aluminum alloy case, shiny and scratch-resistant. 3. Cotton braided body, anti-winding and durable. 4. The plug-in interface is compatible with MP3/smartphone/tablet/laptop/desktop. 5. The output interface is compatible with car/headphone/audio.Specification: Package Weight One Package Weight 0.04kgs / 0.08lb One Package Size 16cm * 11cm * 1cm / 6.3inch * 4.33inch * 0.39inch Qty per Carton 240 Carton Weight 7.20kgs / 15.87lb Carton Size 42cm * 35cm * 34cm / 16.54inch * 13.78inch * 13.39inch Loading Container 20GP: 533 cartons * 240 pcs = 127920 pcs 40HQ: 1238 cartons * 240 pcs = 297120 pcs