Features: 1. It Is Recommended To Choose A Voltage Of 32V And A Current Of About 17A. 2. Can Be Connected To Mobile Phones, Laptops Or Desktop Computers 3. TDA8954TH Core Chip 4. Professional Installation Is Required To Avoid Product Damage 5. Two-Channel, Better Volume Description: 1. Product Name: TDA8954 Two-Channel Power Amplifier Board 2. Product Model: XH-M258 3. Core Chip: TDA8954TH 4. Input Voltage: Dual Ac AC12-28V (Dual 24V Circulation Recommended) 5. Output Power: 420Wx2 6. Number Of Channels: Two Channels 7. Output Impedance: 2-8 (4 Recommended) Note: Different Batches May Have Differences In Product Appearance, Color, And Printed Characters, Which Will Not Affect The Use size: About 140 x 104 x 30mm Material: PCB colour: As Shown Package Contents: 1 x Digital Audio Amplifier Board Module 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.