Pyle? Pro 4 Mics vhf wireless rack mount lavalier/headset system features RF indicators and AF level meters, 1/4" and xLR mixed outputs. Mic supports a frequency range of vhf 160 to 270m - Hz and has individual volume controls.. Professional VHF wireless system.4 belt pack transmitters with lavalier and headset mics. - Frequency range: VHF 160 -270 MHz. - Power on/Standby/off switch. - RF indicators, AF level meters. - Individual volume controls, 1/4" individual and 1/4" and xLR mixed output. - Operation range: Up to 240'. Available frequencies (Hz): Set 1 -215.5, 174.8, 200.6, 180.8/Set 2 -212.6, 190.1, 214.2, 193.0. Power supply: 110/220 V.Perfect for professional engagements, religious events, and is also a great way to have fun with friends and family. - Features a mixed xLR output, giving the highest quality sound possible.4 x 9 V batteries and 1/4" audio cable included. - Warranty: 1 year. - Pyle Pro 4 Mics vhf wireless rack mount lavalier/headset system features four belt pack transmitters with Lavalier and headset mics, operates for a range upto 240'.