TWS Headphone (True Wireless Stereo). Wireless connection: V5.0 + EDR. Effective distance: 10m. Battery capacity of the case: 300mAh. Headset battery capacity: 35mAh. Autonomia:3hs. Charging time: 70 minutes. Led indicator of battery percentage in the case. Microphone incorporated. Frequency response: 20Hz ~ 20KHz. Sensitivity: 105db ± 3db. Charging port: Micro USB. Includes: manual and load cable.