1. Free switching between calls and music. Wire-controlled intelligent control, simple and convenient. 2. 3.5MM round hole interface, suitable comptiable with multi-platcomptiable withm, multi-system, and major brand mobile phones. 3. Flexible wire is not easy to wind Lossless transmission, restore sound, not easy to knot or break. 4. Compatible with iOS and Android devices. In-ear headphones are ergonomically designed to fit each ear perfectly. Notice: Actual color may be slightly different from the image due to different monitor and light effect. Please allow 1-3cm deviation due to manual measurement. Description: Type: Wired headset Model: U19 Headphone type: in-ear headphones Plug type: in-line type Earplug material: PVC Plug diameter: 3.5mm round hole Cable length: 120CM Wearing method: In-ear Headphone output source: portable audiovisual Plug diameter: 3.5mm Plug type: in-line type Microphone: Yes Sound principle: moving coil Frequency response range: 20-20 (Hz) Impedance: 16 () Sensitivity: 98 (dB) Speaker diameter: 10 (mm) Earplug/earmuff material: pvc includes: 1 x Universal 3.5mm Wired Headset