&bull: Customise the length to suit your needs &bull: Zip them up to avoid annoying wire tangling &bull: Compatible with new media smartphone devices with 3.5mm jack &bull: Comfortable custom fit includes 2 sizes of silicone ear tips &bull: Frequency response: 20Hz-20kHz &bull: Speaker impedance: 32 Ohm ±15% &bull: Sensitivity: 102-105 dB &bull: Cord length: 2.00 m &bull: Microphone size: 29 mm &bull: Material: POM 25%, Aluminium 25% PVC 25%, Copper 5%, Braided Wire 10%, Stainless Steel 3%, Kirsite 12%, Others10% ...Contact us if you need more help.