Features: Built-in microphone with answer and power on and off button. Standard 3.5mm port, compatible almost all mainstream smartphones. Deliver clear sound even in noisy place, shows quality sound experience. Air tube reduce radiation about 98%, provide quality sound for calls and music. Very suitable for use in high-ambient environments, such as driving, riding motorcycles and bicycles or other working environments that require careful communication. Specifications: Material: Plastic Color: Black Cable Length: about 1m/3.28ft Name: Stereo Air Tube Earpiece Speaker Specifications.: 10mm Sensitivity: 102db SPLAT1KHz Speaker Frequency Response: 20Hz-20000Hz Rated-power: 100MW Power Processing Capacity: 1000MW Compatibility: Mobile Phone with 3.5mm Power Port Note: Please allow 0-1cm error due to manual measurement. Please allow for slight color difference due to different monitor resolution. Package includes: 1 Piece Earphone with Built-in Microphone