Features: 1. Contains 2.4G Radio, Ble+Zigbee Baseband And Design 2. 32-Bit Risccpu, Cache And Memory 3. 5v Usb Cable Power Supply, USB Burning Program 4. Bl702 Is A Highly Integrated Ble And Zigbee Combination Chipset For Iot Applications. The Wireless Subsystem Includes 2.4G Radio, Ble+Zigbee Baseband And Design. The Microcontroller Subsystem Contains 32-Bit Risccpu, Cache And Memory. The Power Management Unit Controls Ultra-Low Power Modes. 5. In Addition, Various Security Functions Are Supported. Peripheral Interfaces Include USB2.0, Ethernet (Bl704/Bl706), Ir-Remote, SPI, UART, 17987, I2C, I2S, PWM, QDEC, KeyScan, ADC, DAC, PIR, GPIO. Development Environment: Here we take the gpio_blink project as an example to briefly explain the development environment and compilation process. Jianchi CDK Download link: Flathead Chip Open Community - Flathead(t-.cn) IDE: Download Jianchi CDK, unzip it and install it. Example: Unzip /bl_mcu_sdk-release_v1.4.5.zip. Move the unzipped folder to the full English path (no Chinese in the path) And find the cdk project file in that directory. Note: Different Batches May Have Differences In Product Appearance, Color, And Printed Characters, Which Will Not Affect The Use size: about 35 x 20.35mm Material: PCB colour: As shown Package Contents: 1 x BL702 Development Board 2 x 8P Double Row Pins 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.