Axess MPWL1504-BK Professional Dual Wireless Microphone, Wireless FM Receiver Working Range (150 FT.) Included- 6.3 adapter to a (3.5 mm) Comes with wireless receiver for enhanced mobility. Easy to use and affordable alternative that is ideal for meetings, events, speeches, etc. Great for systems guitar amplifier, karaoke machines, Includes: 2 microphones, 1 receiver, 2 built in retractable antennas,1 piece, microphone input jack cable, instructions in box (batteries in package are not for commercial use) Product requires a powered (not passive) output device (speaker, amplifier, mixer) for use. (Please be sure that the receiving unit is connected to the output device via a microphone jack or auxiliary jack)