1. kv4p HT is a homebrew VHF radio that makes your phone capable of voice and text communication completely off-grid with at least a Technician class amateur radio license. 2. The radio simply plugs into the USB-C port on your Android smartphone and transforms it into a fully-fledged handheld radio transceiver. It's completely open source (GPL3): the Android app, ESP32 firmware, PCB designs, and 3D printer files. 3. 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. 4. Version: KV4P HT 2.0, Designer:Vance Vagell, Hardware:Smitty Halibut 100% ham radio, always completely off-grid Crystal-clear 44kHz 8-bit ADC/ 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 to charge except your phone 1 watt transmit can go miles yet sips your phone's battery Accessibility options: live closed captions (on supported phones), turn off animations, sticky PTT with haptic feedback Color:Black Material:ABS Package Contents: 1 set * Kv4p HT V2.0 Radio Module Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.