Technical specifications

Component	Detail
Microcontroller	STM32F103-series (the same chip used on the popular “Blue Pill” board) — Arm Cortex-M3 @ 72 MHz
Onboard MCU memory	64 KB flash / 20 KB SRAM, used to run the H1 firmware itself
Script storage	External SPI NOR flash, configurable capacity (see Flash variants)
USB	USB 2.0 Full-Speed — composite HID (Attack Mode) / CDC (Upload Mode) device
PCB	2-layer, with onboard surge / ESD protection
Form factor	USB flash-drive style; slightly larger than a standard thumb drive
Power	5V, bus-powered over USB — no external power supply required

The pages in this section expand on each row: physical dimensions, how script capacity scales with the flash variant fitted, power and USB behaviour, and the two buttons and single LED that make up the on-device interface.