Range of frequencies: 2.4GHz DC is the charging voltage. 4.8–5.4V Transmission range: 20 meters (without any barriers) About 7 meters is the human obstacle distance. Digital microphone Time spent working: five hours The microphone can be charged four to five times with this charging case. Ratio of signal to noise: 64 dBm Initial current: 1.5–6 mA Interface for charging: Type-C 18 Mbps is the transmission delay. Current on standby: 4.3–5.5 mA Microphone Sensitivity: -26dB 80mAh is the microphone's battery capacity. Ceramic antenna is the type of antenna. 65mA is the charging current. Range of frequency response: 20–20 KHz Capacity of the charging case battery: 300mAh