This watch features an e-paper display with open-source hardware and software. It has a minimalist design that uses the PCB as the watch body, enabling it to be worn as-is or customized with 3D-printed cases and straps. It functions as both a timepiece and a wearable development platform. The e-paper display delivers a crisp, monochrome image with 200 x 200 resolution, offering excellent visibility in direct sunlight and zero power consumption between screen updates. It features a wide viewing angle. The device supports Wi-Fi and Bluetooth LE connectivity, enabling integration with internet-based APIs (e.g., weather, news, traffic, maps, Spotify) and Bluetooth LE-enabled devices. Built around the ESP32 microcontroller, it benefits from strong community support and compatibility with multiple development frameworks, including Arduino, MicroPython, ESP-IDF, and Zephyr-RTOS. Key features include: - 1.54-inch ultra-low-power e-paper display (200 x 200 pixels) - Wi-Fi and Bluetooth LE connectivity - 3-axis accelerometer with gesture detection - Real-time clock with calendar and alarm functions - Built-in USB-to-serial adapter for on-the-go programming - Vibration motor for alerts - Four tactile buttons - Open-source hardware and software - Extensive collection of example projects and watch faces - Open-source 3D-printable case designs - USB-C port - Battery life: up to 1 week (3–4 days with Wi-Fi enabled) - Not waterproof - Color: Black - Material: PCB and electronic components Package includes: - 1 x Watch - 1 x Watch strap - 1 x USB-C cable