Wireless microphone headset system: [●●●Only For Mic Jack, Not Aux Jack, Otherwise No Sound●●●]●Built-In High Sensitivity Condenser Microphone, Transmission Distance Upgrade To 160 Feet (50m) ●Signal Stability●No Delay●No Radiation ●Anti-Howling ●Anti-Jamming ●Constant Frequency ●Clearer Sound Quality. Compatible Voice Amplifiers, Multimedia.It Is A Portable Karaoke Equipment.(Excludes Amp＆Not Supported Iphone, Bluetooth Speaker, Pc And Laptop)●●●Fcc Id Obtained By Fcc Test●●●%ocs%Easy to use: Please Turn On The Transmitter And Receiver Power Switches, The Blue Light Will Flash For Approximately 2s, Indicator Light Stops Flashing After A Successful Match, And Then You Can Use It,No Further Action.●Headset And Handheld Is 2 In 1 Design, Easily Change The Handheld Mode To Headset Mode To Meet Your Needs.Not Supported Android Phones, Iphones, Macbooks, Laptop, Bluetooth Speaker.%ocs%Charge and work of wireless microphones: ●The Transmitter And Receiver Are Built-In 400 Mah Rechargeable Lithium-Ion Batteries That Can Offer About 6 Hours Working Time. ●Usb Cable Has Two Micro Usb V2.0 To Charge For The Transmitter And Receiver At The Same Time, Fully Charge Is Only 2.5 Hours.●Perfect Application: ●The Plug On The Receiver Is 3.5mm. For 6.35mm Amplifiers,Please Use The Additional 6.35mm Adapter（Included）To Connect More Equipments.%ocs%Use multiple wireless microphone at the same time: Please Refer To The User Manual To Channel Switching( Max 15 Channel ) In (●Part 4 Advanced Operations To 4.2 Note B,Page 8) Otherwise There Maybe Noise Or No Sound. Use Up To 15 Microphone Headset At The Same Time. Built-In Cardioid Polar Pattern Condenser Microphone,Widely Applied To Conference,Speech, Web Podcast,Youtube, Google , Outdoor Live, Yoga Instructor, Voice Amplifier, Dancing Instructor, Promotion, Game Etc.%ocs%What if i can’t pair or no sound: ●1.Turn Off The Receiver And Transmitter,● 2.Turn On The Transmitter（Handheld Microphone), Blue Light Is On, Long Press “+ ” To Blue Light Flash ●3.Turn On The Receiver And Wait For The Connection ●4.The Blue Lights Of The Transmitter And Receiver Stop Flashing, The Connection Is Successful.●We Offers 1-Year Warranty And Free Replacement Service, If You Have Any Question, Please Contact Us Anytime.