Truly wireless. Perfectly simple. Our smallest, lightest True wireless earbuds pack a full punch of new Tech. Each bud has a single button to do everything you’re used to, and sound brilliant doing it. Impedance: 16 Ohms ±15%, Driver Diameter: 6mm, Connection Type: Bluetooth 5.0,Sound Pressure Level: 99-105dB,Frequency Response: 20Hz - 20KHz.