This is the pre-soldered version of XIAO nRF54L15 Sense, a powerful yet compact development board built around Nordic's nRF54L15 SoC, featuring a 128 MHz Arm-M33 core with 1.5 MB NVM. This thumb-sized board excels in modern IoT applications with comprehensive wireless connectivity. The dev board supports multiple wireless protocols including BLE 6.0, Matter, Thread, and Zigbee (IEEE 802.15.4-2020). It also features a new 4 Mbps mode for proprietary 2.4 GHz protocols. With ultra-low power consumption, it is ideal for battery-powered IoT devices. The tiny board offers 14 GPIOs, a USB Type-C interface, and onboard battery charging capabilities. This version integrates an onboard digital microphone and a 6-axis IMU for audio and motion sensing. Enhanced security features provide robust protection for IoT deployments. Developers can leverage the Nordic Connect SDK and PlatformIO with RTOS support for efficient development workflows. It is compatible with major ecosystems such as Sidewalk, Find My, and Find My Device through the Connect SDK. Comprehensive security features include secure boot, secure firmware updates, secure storage, TrustZone-enabled trusted execution environment, cryptographic acceleration with side-channel protection, and tamper detection, ensuring robust protection for IoT deployments. Full support for Nordic Connect SDK and PlatformIO enables efficient embedded development workflows. (Note: IDE support is not currently available.) Color: Black Material: PCB Package Contents: 1 x XIAO nRF54L15 Sense development board Only the above package content is included; other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture to vary slightly from the real thing. Measurement error allowance is +/- 1-3 cm.