Instructions for Wire Edition: Lava: Drive unit: Ф15mm / 6u (true copper ring horn) Sensitivity: 110dB Frequency Response Range: 20Hz--20KHz Package Includes: 1 x earphone （Dikirim dalam tas） Product features: （1)lightning interface, headphones with automatic upgrade chip, don't have to worry about the iPhone version upgrade; 2) functions such as up and down song selection, volume control, pause and call can be realized. 3) imported chips, lossless digital sound quality; 4) ultra-thin diaphragm copper ring horn, bass effect.