The K622 model is designed to give you a UHF system with digital AF and RF transmission, providing greater reliability and stability. The entire system is encrypted and has PLL technology, making it even more reliable to use in any scenario. We have adopted two RF band options in our K622 range, the first being 560,000MHz to 590,000MHz, ideal for locations where the 660,000MHz to 690,000MHz option is congested.