? PREMIUM MICROPHONES: The premium metal construction and steel mesh of the microphone grille make the microphones resistant to corrosion and impact damage. Implemented with noise-cancelling element to guarantee outstanding clarity by filtering out unwanted background noise and suppressing howlround. ? BATTERY POWERED: Battery-powered microphones allow performers to have maximum freedom of movement on stage. With upto 30 hours of battery life, performers will never have to worry about being cut out in the middle of a set. It’s ideal for classroom activities, meetings, and outdoor concerts. ? EASY SETUP & PORTABILITY: The wireless microphone system allows fast setup and easy portability. It frees performers from the messy cables and helps them to move unimpeded without fear of tripping over cables during performances. NOTE:Please make sure there is a 6.35mm mic input on your device before connecting the TONOR wireless microphone to it. ? DUAL ANTENNAS: Features VHF wireless system to have more transmitter range and be less prone to electric appliance interference. Implemented with dual antennas to maximize wireless signal strength and increase the signal distance to 65 ft.NOTE: It is recommended not to use two sets of product at the same time. ? WHAT YOU GET: We will serve you with our all sincerity. Any questions, please contact us: click Ask Seller or TONOR on your order page. NOTE: The frequency of this system is fixed and cannot be adjusted to other frequencies. The display content on the receiver screen is also fixed and will not change.