EASY SETUP & OPERATE - Plug & Play, cable-free, the wireless mic system is preset with 20 selectable frequencies. (902-928Mhz complies with FCC rules) Automatic frequency pairing makes it portable, versatile and easy to setup, less prone to interference and low distortion, thus to use its best performance. MULTI APPLICATIONS - Ideal for online teaching, podcast, live recording, teacher classroom amplifier, voice over projection, YouTube streaming, capturing interview, outdoor performance, enjoy your charming voice with this USB mic. FULL COMPATABILITY- Dual-mode (Digital/Analog) USB receiver with built-in sound card is compatible with PC ( Windows / Mac), iPhone Android phones, Plug and Play, No extra drivers needed. CRYSTAL CLEAR SOUND & RELIABLE WIRELESS PERFORMANCE – Built-in high sensitivity professional Dynamic moving-coil capsule ensures Crystal CLEAR SOUND with working range up to 60ft. UHF digital wireless technology provides a stronger signal and ultra-high Fidelity, reducing the possibility from Bluetooth or WIFI interference and dropouts. RECHARGEABLE BATTERY– With built-in rechargeable Lithium Battery, both the microphone(s) and the receiver support 7 hours working time and can be easily charged by USB power supply. Never be annoyed by replacing battery anymore.