Main Features:<br />TTP224 4-key touch sensor IC<br />4-way level indicator<br />Working voltage: 2.4 - 5.5V<br />Set output / input mode， max output time， fast / low power consumption<br />dimension: 35 x 29 mm<br /><br /> Frequently Asked Questions:   <br />Q1. Why are these called Arduino Compatible? <br />A1. The Arduino group demanded us to remove their logos and rename these products so that they do not lead customers to believe they are the same units sold by Arduino<br />Q2. Are these 100 percent compatible with the normal Arduino's? <br />A2. Yes， they really are completely compatible with normal Arduino's. Build quality looks the same and everything (studio， library， tools， etc) just works<br /><br />    Specifications<br />General<br />  Model: TTP224                                                  <br />                        Material: CCL + Element                                                 <br />Weight and Size<br />  Product Weight: 0.005 kg                                                  <br />                        Package Weight: 0.06 kg                                                  <br />                        Product Size(L x W x H): 3.5 x 2.9 x 1 cm / 1.38 x 1.14 x 0.39 inches                                                  <br />                        Package Size(L x W x H): 20 x 14 x 3 cm                                                 <br />Package Contents<br />  Package Contents: 1 x Sensor Module                                                 <br /><br /><br /><br />                                                <br />