Description 1. High-performance MCU: Silicon Labs EFR32MG24 SoC, 32-bit 78 MHz ARM -M33 with instructions 2. for Matter Native: Compatible with for Matter over Thread and for Bluetooth Low Energy 5.3, supported by for Core 3. Excellent RF performance: Equipped with an onboard antenna, the BLE range can reach 50m in an open location without signal interference, while retaining the external UFL antenna interface 4. Ultra-low power design: Power consumption is less than 1.95A in sleep mode, which is ideal for battery-powered projects 5. Rich onboard resources: additional 4MB flash memory on board, onboard battery charging circuit, 19 GPIOs, LEDs On-chip security encryption: A dedicated hardware security engine with its own CPU enables secure vault functionality. Classic for XIAO design: retains the classic for XIAO design, with a size of 21 x 17.8 mm, thumb-sized, single-sided mounting, ideal for projects with limited space such as wearable devices for XIAO accessory add-ons and kit compatibility: natively compatible with all for XIAO accessory add-ons and kits, including Grove expansion, CAN bus, LED matrix, visual AI sensor, circular display, module, 2 microphone array, e-paper display, mmWave sensor, LoRa module, etc Specification:MG24 Colour:Black Material:PCB Package Contents: 1 x Development Board Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.