2.4GHz transmission technology, 2 microphones support recording at the same time, suitable for multi-scene creationCompatible with TYPE C interface mobile phones (does not support any models for Samsung and for Redmi), compatible with PCs, tablets, cameras, etc.Open the charging box to power on, put them in the charging box, close the lid and power offThe storage box is also where the transmitter and receiver are paired and chargedLow power consumption, low latency, good noise reduction, high sound quality and claritySmall and portable, long battery life, plug and playTransmission distance is up to 80m Specifications: Microphone:Frequency: 2.4GHzMicrophone working time: about 7 hoursCharging time: 80 minutesTotal working time: about 35 hoursMicrophone battery: 70mAhMicrophone Type: Digital MicrophoneTransmission delay: 15msUnit weight: 8.2gUnit size: 47.1*15.04*15.61mmIndicator light: red/green/blueSensitivity: -26dBFSR/N ratio: 64dBReceiver:Frequency: 2.4GHzCharging method: plug inIndicator light: greenUnit weight: 4.5gUnit size: 47.5*13.47*7.95mmCharging Box:Battery Type: Polymer Lithium-IonBattery capacity: 600mAhCharging time: about 1.5 hoursWeight: 54.5gInput voltage: DC 4.8-5.4V Package included: 2 x Wireless Microphones 1 x Receiver 1 x Charging Box 1 x English User Manual 1 x USB Cable Other items not include