Main Features:<br />Suitable for PC， printer， car audio system DIY <br />Pins to GND， digitla I/O output to S pin<br />VCC output to 3.3~5V<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% 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 />  Type: Active buzzer sound module                                                  <br />                        Compatibility: Ardunio                                                 <br />Electronic Components<br />  Architecture: Arduino                                                  <br />                        Operating Voltage: 3.3-5V                                                  <br />                        PCB Size: 16 x 19mm                                                 <br />Weight and Size<br />  Product Weight: 0.002 kg                                                  <br />                        Package Weight: 0.050 kg                                                  <br />                        Product Size(L x W x H): 1.9 x 1.6 x 1.0 cm / 0.7 x 0.6 x 0.4 inches                                                  <br />                        Package Size(L x W x H): 3.0 x 3.0 x 2.0 cm                                                 <br />Package Contents<br />  Package Contents: 1 x Active Buzzer Module                                                 <br /><br /><br /><br />                                                <br />