PocketRadio is an ATtiny402/412 controlled FM radio with RDS (RDA5807MP), an integrated audio amplifier (TC8871 or XPT8871), a LiPo battery charger (MCP73831 or TP4054), an OLED display (SSD1306) and three buttons. It integrates a protected 3.7V LiPo battery, a 3W / 4Ω speaker and an FM antenna.