This product is made of PCB material, strong and. ^^ Adopting high specification craft, carefully welding, hole position, complete functions. ^^ Compliant with FCC/CE-RED/IC/TELEC//SRRC/NCC standards, communication distance up to 300m. ^^ For -ESP32240MHzXtensa single/dual-core 32-bit LX6 microprocessor for stable and powerful performance. ^^ It is very easy to install and does not require particularly complicated operations. ^^ ^^ ^^ ^^ ^^