Features: 1. Excellent sound quality, ergonomic design: ear-ear structure, leather earmuffs, memory foam filling, soft and comfortable 2. Clear call, high-quality microphone: the extended microphone handle can be adjusted by 120 degrees; built-in microphone, clear call, accurate pickup 3. Easy to operate, integrated wire control: wire control integrated volume adjustment and microphone mute switch, easy to use, durable 4. Simple design and excellent workmanship: high-strength engineering plastic with leather earmuffs, matte black surface effect 5. The product is reliable and durable: up to 2 meters of wire, reliable and durable; 3.5mm audio plug, good bending resistance and long service life Product parameters: 1. Material: Plastic 3. Plug diameter: 3.5mm 4. Sensitivity: 102dB 5. Frequency response range: 20Hz-20KHz 6. Product weight: 0.15kg Release notes: Single hole: 1. For mainstream single hole (CTIA international standard) 2. For mainstream mobile phone brands 3. Not For some single-hole notebooks (not for all ASUS notebook series, Hasee and some domestic brand laptops) Double hole: 1. For all desktop notebook computers and dual-hole version equipment