Highlight sport,running,gaming,dj,audiophile,working type-c wireless two-channel (stereo) hands free,headset description 1. one touch control, simple operation 2. dual channel connection, free switching between master and slave 3. semi-in-ear design, stable to wear 4. mobile phone, tablet, computer with bluetooth function can be used 5. light weight and easy to carry specification 1. bluetooth receiving distance: 10m 2. battery capacity: 55mah x2, charging compartment capacity: 300mah 3. use time: about 8 hours 4. standby time: 200h 5. speaker frequency range: 20hz-20khz 6. speaker size: 10mm