- Material: PCB<br />- Bluetooth expansion board for Arduino<br />- Great for DIY project<br /><br />                                                                                                                                Dimensions: 2.24 in x 1.77 in x 0.79 in (5.7 cm x 4.5 cm x 2.0 cm)<br />Weight: 0.49 oz (14 g)<br /><br />