The KV4P HT V2.0d Ultar version uses better components and high-quality 1.5M Coiled Cable, which can improve the stability of the product. The radio simply plugs into the USB C port on your for Android smartphone and transforms it into a fully-fledged handheld radio transceiver. kv4p HT is a homebrew UHF radio that makes your phone capable of voice and text communication completely off-grid with at least a Technician class amateur radio license. It's small enough to fit in your pocket and take anywhere, and since it has no internal battery it's the perfect radio to put in a go-bag or your car's glove compartment. 100% ham radio, always completely off-grid.