voltage: DC12V- DC26V Output: Max 150W SNR: 100dB Use DC12V power 50W, DC20V power 100W, DC24V power 150W colour: red+gold Material: metal Size: 77 x 73 x 16mm Package Contents: 4 x TPA3116D2 Mono 150W Digital Power Amplifier Board 12-26V Only the above package content, other products are not included. Note: Light reflection 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.