Version: KV4P HT 2.0, Designer: Vance Vagell, Hardware: Smitty Halibut. ADC/44kHz 8-bit audio,for crystal clear, with filters and squelch functionality. 1 set KV4P HT V2.0 Radio Module. It is fully open source (GPL3): thefor Android application,for ESP32 firmware, PCB design, and 3D printing files are all publicly available.
eBay