Reference: RBD-1021
PAM8406 5Wx2 Class D Digital Stereo Audio Power Amplifier Module Board
Operating voltage: 2.5V-5.5V, recommended 5V Speaker Load: 2-8 Ohms Input and Output Connectors: Pins on 0.2" centers Size: 24 x 23 x 105 mm (L x W x H) Net weight: 3g