Description: Simple design and headband for comfort, help you minimize tiredness Adjustable headband meets the requirement of all head sizes. Lightweight design for you won’t become their burden. 3.5mm audio jack compatible with your most devices, such as cellphones, laptop, computer, MP3, MP4 and other Audio devices.Plug-play and easy to carry. Noise Isolating, a good choice for your kids to learn school online course. The built-in microphone provides clear and hands-free communication. The headphone cord length is 1.5m, it's very durable . Specification: Model: 588 single hole Type: Wired Headphone Plug diameter: 3.5mm Plug type: straight plug With or without a microphone: Yes Sound principle: moving coil Sensitivity: 20dB Diaphragm: 32Ω Impedance: 11Ω Horn diameter: 38 Φmm Frequency Response Range: 20-100k Hz Cable length: 1.5 meters Material: ABS plastic Earplugs/earmuffs material: cotton Headphone wire material: leather wire Package Includes: 1 Piece Headphone Note: 1. Please allow slightly error due to manual measurement. 2. Due to the difference between different monitors, the picture may not reflect the actual color of the item. 3. Wish you a wonderful on-line shopping!