Professional Dynamic Vocal Microphone: Built-in Dynamic Unidirectional microphone core (95dB), Vocal is clearer.●for conference, speech, web podcast, Yoga instructor, church, family party, opening ceremony, dancing instructor, promotion etc. ●The mic outer case is alloy material which is harder, lighter and more wear-resistant, This microphone has a better weight and grip experience. ●Cool led light ring (working in green,charging in red), enhance fashion clear white led display. Professional UHF Wireless Microphone System: With UHF frequency band(Use lawful signal bands with US FCC ID), The microphone connection maximum distance is about 240feet (75M). With 15 adjustable frequencies per mics, ensuring that up to 15 sets can be used simultaneously without worrying about interferences.●Receiver with Bluetooth, first connect the receiver with speaker, then connect bluetooth(Name: Bietrun) on your phone to play music And use the mics to karaoke along with the music. Rechargeable Handheld Microphone: ●No battery needed. ●The microphone are built-in 1200mAh rechargeable lithium-ion battery, work time up to 7 plus hours with charging time 3-4 hours. Plug and play, no need to pair. ●The dual charging cable are included, support 2 microphones charging simultaneously. ●The receiver has a UL-Certified plug, very safe. Compatible with Multiple Multimedia Devices:● Easy to use, Plug and play.●The receiver have 6.35mm Mic+3.5mm TRS audio+XLR L+R 2 Channel output Interface.●You can choose 6.35mm(Included), 3.5mm(Included), XLR(Not included) cable you need to connect the other side to JBL Partybox, Sony SRS-XP Series, ION Speaker, amplifiers, bluetooth speakers, TV Boxes, mixers, PA system, Karaoke Machine, Multi-Media Equipment, Etc. Packing List And 1-Year Warranty: Bietrun offers 1-Year warranty and free replacement service. Packing List: 2* Microphone, 1*3.5mm to 3.5mm cable, 1*Receiver, 1*Dual charging cable,1*Bluetooth Antenna,1*Adapter, 2*Microphone Antenna, 1*Manual, 1*6.35mm to 6.35mm cable.