ITEM NAME:PAM8406 Digital Amplifier Board With Volume Potentiometer 5Wx2 Stereo for A E4H1 PAM8406 Digital Amplifier Board With Volume Potentiometer 5Wx2 Stereo for A E4H1 Material: metal Rated Voltage: 2.5-5V Max. Voltage: 5.5V colour: blue size: 23*24MM Package includes: 1 x Digital amplifier board Note: Light shooting and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm..1 x Digital amplifier board. Note: Light shooting and different displays may cause the color of the item in the picture a little different from the real thing. size: 23 24MM.