The M5Stack CardputerZero is a tiny, portable computer that's about the size of a small stack of business cards. But despite its compact size, it's a full-fledged PC with a display, keyboard, and support for Linux-based software. M5Stack has been selling similar devices under the Cardputer brand for a few years, but up until now they've featured ESP32 microprocessors and far too little memory to support Linux. But the CardputerZero is powered by a Raspberry Pi Compute Module 0, which means it's got the same Broadcom BCM2710A1 quad-core Arm Cortex-A53 processor as a Raspberry Pi Zero 2W, along with 512MB of LPDDR2 and support for WiFi 4 and Bluetooth 4.2 LE.

The Interrupt is a handheld computer with a QWERTY keyboard for thumb typing, a 3.5 inch IPS LCD color display, and a Kali Linux-based operating system. But while you can use it as a general purpose device, it's really designed as a sort of Flipper Zero-like system for tinkering with nearby wireless devices. In addition to WiFi 5 and Bluetooth, the handheld has a CG1101 sub 1 GHz radio, NFC and RFID support, and an IR receiver.