Product Performance Description Dual-duty cable & Adapter-free: There are gold-plated 3.5mm & 6.35mm plugs on each end of the audio cable, just simply plug in according to your needs, and no more trouble finding a single adapter. Specially designed for DJ, perfect for mixers, electric guitars, keyboards, and more. Bluetooth music sharing: Pair your device via Bluetooth and share your tunes through the dual-duty cable! Simply make one of the FUSION headphones enter into pairing mode. Connect the main headphones with 6.3mm jack, and use the other end 3.5mm jack to connect another FUSION headphones. Then you can share your favorite music and videos with your friends. Super sound quality: Hear every detail: Japanese voice coil and Japanese driver diaphragm delivers professional-quality sound. Immerse yourself in highly accurate mid-to-high tones that are true to the original recording while never losing composure-even at high volume. Technical Description Speaker: 40 mm Impedance: 32 Ohms Sensitivity: 110dB + 3dB Frequency Response: 20Hz-20KHz Charging: Micro USB Charging Cable Plug type: 3.6 mm Audio Cable with In-Line Mic Bluetooth headset Bluetooth chip:CSR8635 Battery capacity:430mAh Bluetooth 4.0 Playing time: 25 hours Talk time: 20 hours