The module uses high-precision A / D converter chip HX711 is designed specifically for high-precision electronic scales- two analog channel input- the internal integration of 128 programmable amplifier gain of. The input circuit can be configured for electrical bridge (bridge pressure as the pressure weighing) sensor mode is for high-precision- low-cost sampling front-end module. Features - ColorAssorted Color - Material: Metal. - Size: 13x13x7.5cm - Operating voltage range: 5V-10V. - The input circuit can be configured for electrical bridge sensor mode. - for high-precision- low-cost sampling front-end module. - Warm Tip: Dear buyer, Due to lighting effect,monitor's brightness,manual measurement and etc, there could be some slight differences in the color and size between the photo and the actual item. sincerely hope that you can understand! Thank you! Package list: 4 pcs x 1 set of Weighing module