Features: and The module adopts ESP-12S, which is based on ESP8266's low-power UART-WIFI chip module. The main frequency supports 80MHz and 160MHz. Scope of application:Any SD card interface that communicates via SPI can be plugged in and used directly. Such as:for BIGTREETECH SKR series motherboard, GTRmotherboard, for BIGTREETECH TFT24 V1.1, for BIGTREETECH TFT35 V3.0, for BIGTREETECH TFT35-E3 V3.0 and so on. Note: All SD card interfaces that communicate via SDIO mode cannot be used; For example: for BIGTREETECH TFT35 V2.0! Specifications: The module adopts ESP-12S, which is based on ESP8266's low-power UART-WIFI chip module The main frequency supports 80MHz and 160MHz Spectrum range: 2412-2484MHZ Logic voltage: for DC 3.3V USB input voltage: for DC 5V Type: without TF Card / with TF Card (optional) Size: SD: approx. 24x58.3mm/0.94x2.3in Transmission file name format requirements: only support the file name consisting of ASCIIcode TF card memory: 128M Note: No retail package. Due to the problems of lighting effects and shooting angles, there will be certain tolerances in the product, please understand. Please allow 0-1cm error due to the manual measurment. Package includes: 1 x Wireless Transmission Module Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.