Features: Using original TDA7498E. The power filter capacitor adopts 2200UF/35Volt and capacitors for SMAWY. Main circuit of the electrolytic capacitor signal adopts a Taiwanese brand, and main filtering capacitor adopts an imported electrolytic capacitor, ensuring strong and continuous power support. The resistance adopts five rings metal resistor, and main circuit adopts a precised SMT resistor, ensuring a good signal noises ratio of the entire machine. The printed circuit board is made from 1.6mm thick double-sided sheet metal, with a thickness of 2.0A coppered and a full process of tined spray, ensuring good performances in passing large and small currents. Specifications: Material: Aluminum Alloy Color: Black Size: Approx. 108x90x39mm/4.25x3.54x1.54inch Working mode: Class D Statical current: 50mA Work efficiency: 90% Rate output power: 2x100W Frequency response: 20Hz to 20KHz Working voltage: DC20V to DC32V (recommended DC24V internal+external-) Output current: up to 3A Note: Please allow 1-2cm errors due to manual measurement. Please allow for slight color differences due to different display resolution. Package includes: 1x TDA7498E Power Amplifier Board with Aluminum Alloy Housing(Finished Board)