UiiSii HM13 In-Ear Earphone The In-ear design UiiSii HM13 with luxury metal material shell well protects earphones and looks elegant and high-end, comfortable to wear, not easy to fall off.10mm Titanium film moving coil horn, strong bass, clear treble. Built-in integrated hands-free mic ensures high-sensitivity and clear phone calls. UiiSii HM13 Specification: Brand: UiiSii Model: UiiSii HM13 Plug Pin: 3.5mm Impedance: 16Ω Sensitivity: 101±3dB Speaker Size: 0.33Ft/0.39in Frequency Range: 20-20000HZ Cable Length: Approx. 3.94 Ft Material: Metal Vocalism Principle: Dynamic Function: For Mobile Phone, for Video Game, HiFi Features: Superior Sound Performance Compatible with all 3.5mm audio cable jack In-ear earbud with ergonomic design make you feel comfortable. Flexible, light weight, snug and secure, and they can be easily threaded through a jacket, bag, or backpack. This earbuds with microphone is convenient for hands-free calling. button in-line remote gives you the power to easily answer and end phone calls, control songs play/pause, skip