DGNOG DL602 UHF 2 Channel Wireless Microphone System with Rechargeable Microphones and Receiver(Including 3 pcs 18650 1200 mAh rechargeable lithium-ion battery), work time up to 7 plus hours with charging time 3-4 hours, DL602 Wireless mic adopts UHF frequency band transmits signal(Use lawful signal bands with US FCC ID), Plug and play, auto connect, each mic has adjustable 30 Frequency Channel & adjustable volume 10 level, wireless microphone transmission distance up to 200ft/60m, The frequency range is between 545.5-593 Mhz.CHA:545.5-569.0 Mhz, CHB:569.5-593.0 Mhz DL602 Cordless microphone only for input devices with 6.35mm (1/4") or 3.5mm (1/8") MIC interface. Compatible with Party speaker, Singing machine, amplifier, PA system, audio interface, audio mixer and more equipment with mic input. E.g ION Speaker/JBL Partybox Series/Sony SRS-XP Series/Bose S1/PYLE PA System/Electro-Voice ELX Series/PRORECK Club Series/PARTY Series/Rockville BPA Series
