Technical Pro"s Dual-Channel VHF Wireless Microphone System provides you with proven performance and durability in a variety of settings, from karaoke, churches, nightclubs, gymnasiums, concert halls to broadcast booths and stadiums. Technical Pro"s Dual-Channel VHF Wireless Microphone System provides freedom while dancing to your favorite karaoke song by using the wireless headset or the wireless clip-on lapel microphone. Technical Pro"s UHF wireless microphone system includes two belt pack transmitters with two lapel and two headset microphones for a total of 4 microphones! You can choose any combination of two microphones to use at a time; each transmitter has 2 channels for interference free digital processing. Technical Pro s groundbreaking new approach to industrial design incorporates advanced technology and rugged construction, providing years of audio enjoyment. Features: Dual signal VHF high band Frequency Range 109-120MHz Maximum deviation range ±75kHz Frequency Response 100Hz-10kHz Signal to noise ratio >80 dB Modulation mode FM THD <1% Audio dynamic range >80dB Range 50 feet Includes: 2- belt pack transmitters 2- lapel microphones 2- headphone microphones 2- 9-Volt batteries All connecting cables