Inhouse product
| Frequency | 20Hz-20KHz |
| Sound level/Sensitivity | 92dB |
| Power Output | 10mW |
| Connection Type | Wireless |
| Battery | 3.7V / 110mAh Lifetime: about 12 hours Charging input: Micro USB, DC5V, 500mA |
| Duration | Working time: about 8 hours Standby time: about 120 hours Charging time: about 2 hours |
| Others | Color: black |