![enter image description here][1] **DESCRIPTION** The potentiometer twig produces analog output between 0 and Vcc (5V DC with Seeeduino) on its D1 connector. The D2 connector is not used. The angular range is 300 degrees with a linear change in value. The resistance value is 10k ohms, perfect for Arduino use. This may also be known as a rotary angle sensor. For all Grove users (especially beginners), we provide you guidance PDF documents. Please download and read through Preface - Getting Started and Introduction to Grove before your using of the product. **Document** Please visit our [wiki][2] page for more info about this product.It will be appreciated if you can help us improve the documents, add more demo code or tutorials. For technical support, please post your questions to our forum. For more detail, please visit: http://www.seeedstudio.com/item_detail.html?p_id=770 [1]: /editor/20160710/5782052687fef.png [2]: http://www.seeedstudio.com/wiki/Grove_-_Rotary_Angle_Sensor