Hot Sale Foldable Headphone with Microphone for Promotion 1. colorful or pantong color 2. promotional headphone 3. super bass Hot Sale Foldable Headphone with Mic for Promotion1. colorful or pantong color2. promotional headphone3. super bass soundSpeaker: φ40mm Sensitivity:105dB S.P.L at 1KHz Impedance: 32Ω Frequency Response: 20Hz-20,000Hz Rated power: 3mW Power Capability: 15mW Cable Length: 1. ...