Built-in Sub-GHz module based on a CC1101 transceiver and a radio antenna (the maximum range is 50 meters) Both the CC1101 chip and the antenna are designed to operate at frequencies in the 300-348 MHz, 387-464 MHz, and 779-928 MHz bands ESP32-S3 Dual-Core MCU: Built-in Wi-Fi and Bluetooth LE, high-performance dual-core processor, ideal for IoT, AIoT, and edge computing projects requiring wireless connectivity and computing power 1.9 inch LCD Display: Integrated 1.9 inch color LCD screen for real-time status display, data visualization, UI interaction, and debugging interfaces MCU: ESP32-53 with a dual-core LX7 microprocessor Wireless communication: 2.4 GHz Wi-Fi, BLE 5 Flash: 16MB PSRAM: 8MB Battery voltage detection PIN: 1004 Onboard functions: Reset + Boot, Infrared transmission and reception CC1101 Low-Power Sub-1 GHz Transceiver Frequency bands: 300-348MHz, 387-464MHz, 779-928MHz 1.9 inch ST7789V IPS TFT LCD: Resolution: 170(H)RGB x 320(V) Driver chip:ST7789 Color: Transparent Material: PCB+Plastic Package Contents: 1*set of module development boards (screws and electronic tags come in random colors and styles) 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.