Features: Brand new and high quality. The E104 wireless module supports both SPP3.0 and BLE4.2 modes, ensuring compatibility with various devices for stable data transmission. Low power consumption extends battery life for longer usage. Easily configured and controlled using simple commands. Ideal for manufacturers and developers integrating wireless functionality into their products, as well as enthusiasts and DIYers for wireless experiments and projects. From industrial automation to communication scenarios, this versatile module finds applications in data transmission and control systems, improving productivity. Suitable for mobile device accessories or home applications, enabling seamless communication. Advanced technology ensures reliable data transmission and prevents interference. Specifications: Material: PCB Size: Approx. 13x21mm/0.51x0.82inch Note: 1. Please allow 1-2cm errors due to manual measurement, make sure that you do not mind before you order. 2. Due to the difference between different monitors, the picture may not reflect the actual color of the item. Package includes: 1x Serial Port Module