Polaroid vibrating headset model PR-E223-BK has an extra 10mm Vibrating Element inside each ear bud, enabling 4D sound. Polaroid PR-E223BK offers mobile gamers a unique gaming experience, making sounds explode and alive via vibration. Features and Specifications: * Compatible with most smartphones and tablets, equipped with 3.5mm audio jacks * Frequency Response: 20Hz - 20,000Hz * Sensitivity: 103 dB * Impedance: 6 Ohm * Cord length: 120 cm