ITEM NAME:High Power Mono Digital Amplifier Board TDA8954TH Core BTL Fever Class 420W A#S Product Description Description: High Power Mono Digital Amplifier Board TDA8954TH Core BTL Mode Fever Classes 420W Specification: Product model: HW-717 Kernel chip: TDA8954TH Input voltage: recommended double 24V cattle (range double 12-28V) Output power: 420W Number of vocal tract: mono channel Output impedance: recommended 4 ohms (supports 28 ohms). Product size: 80mm*75mm*33mm/3.14*2.95*1.29'' Product weight: 130g Package size: 170mm*120mm*33mm/6.69*4.72*1.29'' Packing weight: 133g Note: Please allow 1-3mm differs due to manual measurement. Due to the different display and different light, the picture may not show the actual color of the item. Thanks for your understanding. Included: 1 x Amplifier Board.Kernel chip: TDA8954TH. Output power: 420W. Included: 1 x Amplifier Board. Number of vocal tract: mono channel. Product weight: 130g. Due to the different display and different light, the picture may not show the actual color of the item.