Specifications:Material: Metal+plasticMini Breadboard Size: 90.5 * 52.6 * 8.5mm / 3.56 * 2.07 * 0.33inUNO R3 Controller Board Size: 76.6 * 53.5 * 13.5mm / 3.01 * 2.11 * 0.53inItem Weight: 152g / 5.36ozPackage Weight: 230g / 8.11ozPackage Size: 19.5 * 9 * 4.5cm / 7.68 * 3.54 * 1.77in Features:A set of professional Arduino DIY kit for your to start your BT Android projects, very easy and reliable to operate.It has all the necessary components for you to learn Arduino input/out signals.Package including breadboard, controller board, rangefinder module, BT module, jumper wire, LED, resistor, etc.Modules features high precision, stable and accurate performance.Small breadboard is convenient for the prototypes and circuit design experiment and other DIY projects, and its back with self-adhesive tape.