DIYmall 2pcs Hx711 Weight Weighing Load Cell Conversion Module Sensors Ad Module for Arduino Microcontroller Size: 3.5CM X 2CM X 0.5CM Weight: 4 Grams UPC: 0702795763015 HX711 Weighing Sensors AD Module for Arduino Microcontroller Document link: https://github.com/aguegu/ardulibs/tree/master/hx711