Features: -2.4GHz transmission technology.  -Three style port receivers Can choose, type-c port, and 3.5mm port.  -Widely compatible use for computer/ Camcorder/ IOS/ Android.  -The storage box is also where to pairing and charging the transmitter and receiver.  -1-time full charging support transmitter working 4.5Hrs.  -Total working time 22Hrs.  -Open charging case Power on, put into charging case, and close the cover power off.     Microphone Specifications: Frequency: 2.4GHz;  Microphone once working time: About 4.5 Hrs;  Charging time: 80min;  Total working time: About 22 Hrs;  Microphone battery: 70mAh;  Mic type: Digital Mic;  How to Charge: Put into the charging case;  Transmission latency: 15ms;  Unit weight: 8.2g;  Unit size: 47.1*15.04*15.61mm;  Indicator light: Red/Green/Blue;  Sensitivity: -26dBFS;  R/N Ratio: 64dB;     Receiver Specifications: Frequency: 2.4GHz;  How to Charging: Plug-in device;  Indicator light: Green;  Unit weight: 4.5g;  Unit size: 47.5*13.47*7.95 mm;     Charging case Specifications: Battery type: Polymer lithium-ion;  Battery Capacity: 450mAh;  Charging time: About 1.5 Hrs;  Recharging time: 5 times;  Weight: 54.5g;     Packing Listl: 1 x Rechargeable Wireless Microphone;  1 x Receiver;  1 x English Manual;  1 x USB cable