A4 Wired Earphone Dual Driver 3.5mm Port Bass Stereo In Ear Sports Waterproof EarphoneFour loudspeaker version Black

A4 Wired Earphone Dual Driver 3.5mm Port Bass Stereo In-Ear Sports Waterproof Earphone (Four-loudspeaker version, Black) The wired earphone uses two moving circles technology, four loudspeakers for loseless sound quality. Sound insulation and 3.5mm plug, it is comfortable to wear to enjoy stereo music. Specifications:Material: Plastic + TPEType: Two-loudspeaker version, Four-loudspeaker version (optional)Color: Black, White, Red, Blue (optional)Type of Headphones: In-EarImpedance: 32ΩPhone Sensitivity: 99dB/mWFrequency Range: 20-20000HzPlug Type: 3.5mm Straight PlugDriver Unit: 2BA+1DD Hybrid Drive Unit (Dynamic Compound + BA Compound)Microphone: with MicrophoneCable Length: 1.2m / 47.24inPackage Weight: 15g / 0.53ouncesPackage Size: 150 * 80 * 20mm / 5.91 * 3.15 * 0.79inPacking List:1 * Wired Earphone Two moving circles in the same direction technology, and four speakers make sound at the same time, loseless sound quality. Air pressure balance design can four diaphragm resonances loss of air pressure eardrum. 60 degree angle in ear, painless comfortable wearing, will not fall easily. Sound leakproof metal rear cover, sound insulation to immerse in music world. Skin-friendly elastic thread, strong tensile force, no knotting.