1、This is a basic 4-digit 7-segment Led display tube module. 2、Suitable for Arduino use library: TM1637.h. 3、Module connected to digital I/O via 2 pins. 4、Designed with 4 mounting holes for easy installation. 5、Made of high quality electronic components, stable and reliable performance Item Type: LED Display Tube ModuleLuminous Color: Red, Yellow, Blue, Green (Optional)Rated Voltage: 5VGross Weight: 17g / 0.6oz(approx.)Product Detail: 0.36 inches, 4 digits, common anode, LED high brightness digital tube<div class="wang-edit-text"><style> .wang-edit-text{ font-family:'Arial' !important; } .wang-edit-text table { border-top: 1px solid #000; border-left: 1px solid #000; } .wang-edit-text table td, .wang-edit-text table th { border-bottom: 1px solid #000; border-right: 1px solid #000; padding: 3px 5px; } .wang-edit-text table th { text-align: center; }</style> 1 x LED Display Tube Module