SKP PRO AUDIO UHF-261 Double Handheld Uhf Dual Pro Wireless Microphone. Professional microphone for singers voiceovers karaoke etc. Its transmission is through UHF diversity in the 500Mhz band. Free of interference. They do not make noise like VHF systems that are not professional. It has a maximum range in open places of 80 meters ideal in closed places of 40 meters. It works with 2 AA batteries that give a autonomy of approximately 6 hours. It has two outputs balanced by Cannon XLR. And also by Plug 6.3mm combined. The system has two HAND Transmitters. BOTH MICROPHONES CAN BE USED SAME TIME WITH INDEPENDENT CONTROL.