The Heatz Ze20 Is A Single-Ear Earphone Designed For Use With Iphones, Including The Iphone X. It Allows You To Listen To Music, Take Calls, And Stay Aware Of Your Surroundings All At Once. The Earbud Is Designed To Be Comfortable For Extended Wear, And It Connects To Your Iphone Via A Lightning Connector. Product Specifications: Manufacturer: Heatz Plug Pin: 3.5Mm Speaker Size: 9Mm Frequency Range: 20-20000 Hz Sensitivity: 90±3 Db Cable Length: 120Cm