Description: Power supply: DC (DC): 3.6v-5.5V Output power: 3W +3 W (4 ohms). SNR: 90dB Efficiency:> 90% positioning hole space: 20mm. Hole diameter: 2mm Four 1.2V batteries can also be powered. "Power": 3.6 to 5.5V, single-cell lithium battery or USB-powered. If supply power by a transformer?the power supply must add 5V regulator circuit ,otherwise the chip will burn if the voltage more than 5.5V. Specification: Material: Plastic Size: 2.4x1.5mm Application: LCD TVs, monitors,Laptop,Portable Speakers Portable DVD players, game consoles,Phone / speakerphone Package Includes: 1 Piece Amplifier Board
