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. The radio simply plugs into the USB C port on your for Android smartphone and transforms it into a fully-fledged handheld radio transceiver. 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. 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. 100% ham radio, always completely off-grid. Crystal-clear 22kHz 8-bit ADC/DAC audio, with filters and squelch. Texting with notifications just like SMS - radio-based APRS messaging (not just location) with built-in 1200 baud modem. Scan through unlimited memories and groups. No battery means nothing to charge except your phone. 1 watt transmit can go miles yet sips your phone's battery. Color: Black Material: PCB+Plastic+Metal Package Contents: 2 x KV4P-HT with case 2 x UHF SMA antenna 2 x 1.5m spring Cable 2 x rubber pad