Description: It is safe to use the power amplifier board because it has overheating and circuit protection. Adopting TPA3118 chip, the power amplifier board can bring you pure and high-fidelity sound effect. Made of electronic component and PCB material, the power amplifier board is durable and reliable to use. The length of the power amplifier board is 45mm and width is 35mm. The power amplifier board is suitable for audio devices, music amplification and so on. Item Name: Power Amplifier Board Material: Electronic Component,PCB Input Voltage: 8~24VDC Chip Model: TPA3118 Size Details: 4.5cm x 3.5cm/1.77" x 1.38" (Approx.) Notes: Please note that the product is a mono channel power amplifier board. If you want to enjoy stereo sound, please use two power amplifier boards. Please note that the power amplifier board is suitable for speakers with impedance from 4Ω to 8Ω, but 8Ω is the best choice. Due to the light and the screen setting difference, the item's color may slightly differs from the pictures. Please allow slight dimension difference due to the manual measurement. Package Includes: 1 x Power Amplifier Board Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement. Sold by-Minnanxin