Features: Usings TPA3116x2. The TPA3116x2 chip is used, and the coupling capacitors adopts 1uF. The maincircuit of the electrolytic capacitors signal adopts ELNA680uF/35vx2. The resistors use 1percent chip resistors to a goodsignal-to-noises of the whole machine. Usings special inductors for iron-silicons-aluminum power amplifiers to crisps and sound. Specifications: Material:ABS Chip: TPA3116 2.0double chip How it works: ClassD Quiescents current: 50mA Work efficiency: 90% Ratedoutput power: 2x100W Frequency Response: 20Hz to 20KHz Working voltage: DC18V to DC24V Maximums output current: 5A Size:Approx.110mm/4.33''x79mm/3.11'' Package Includes: 1x TPA3116 Amplifiers note: Please allow 1mm errors due to manual measurement. Due to the differences between different monitors, the picture may not reflect the actual color.