Features: Our Bluetooth-compatible board for amplifier audio comes with dual channel which means the transmission efficiency is high and the transmission for path is wide. The amplifier uses a high-performance audio filter that can output high-quality sound. Adapted speakers: 30W-60W,4/8, adapted power (recommend): 8V-24V 3A This Bluetooth-compatible board module for amplifier can withstand large currents, no heat, no damage to the wire. With static for protection, overheat for protection, over current for protection, short circuit for protection. Easy installation, mini size, perfect digital audio power amplifier board mp3 amplifier module. Specifications: Product Name: Bluetooth-compatible Amplifier AMP Chip: Professional Chip Max Output Power: 30W+30W Power Supply: DC8-24V 3A Channels: 2.0 Working Type: Class D Model:XH/A232 colour:As Shown Material:FR4 Copper Clad Laminate size:approx 53 x 45mm//2.08X1.77in Note: Only the above package content, other products are not included. Due to the problems of lighting effects and shooting angles, there will be certain tolerances in the product, please understand. Please allow 0-1cm error due to the manual measurment. Package includes: 1 x Amplifier Board