● Antenna type: Ceramic antenna
● Channel system: Two transmitters and one receiver
● Transfer distance: obstacle free distance of over 15 meters
● Working hours: 4 hours
● Charging time: approximately 90 minutes
● Sensitivity (microphone): -38dB
● Charging interface: TYPE-C
● Working temperature: -10~45 degrees
● Frequency response range: 20-20KHZ