Plug and play, without any drivers and applications, easy to use There is no delay in transmission, and the reception is clearer Portable lapel clip design, easy to clip on your clothes collar Real-time clear voice automatic synchronization Provide professional full-band audio 48kHz stereo CD quality 20M/65Ft anti-interference and long working range Extensive versatility and compatibility, compatible with Android phones/tablets with USB Type-C port and laptop with USB C port (support OTG function) Built-in lithium battery (10 hours working time) Specification: Frequency: 2.4GHz Input voltage: DC4.8-5.4V Charging port: Type-C Battery capacity: 80mAh*2 Transmission distance: 8m with obstacles, 20m without obstacles Microphone size: 62*23*28mm Microphone weight: 7g Receiver size: 45*27*7mm Receiver weight: 4g Notes: The laptop needs to be set to microphone input before use. Only applicable to Type-C devices with OTG function (produced after 2019 is better). Some Android phones need to activate the "OTG" function when plugging in the USB-C receiver. Please charge the transmission microphone for 1.5 hours before use. Package included: 2 x Lavalier Microphones 1 x Receiver 2 x Charging Cables 1 x Storage Bag 1 x English and Chinese User Manual