2 W Small Mono Amplifier (Speaker not include) assembled Electronic Circuit : FA674 This item is mono 2W amplifier which was assemble and tested. Use only one IC on board, ***Speaker not include because of it can't ship via Air mail service.*** Require power supply 5-12VDC , Current consume 300mA max at 12VDC 8Ohm speaker Adjust sound level by trim POT on board , Comes with the speaker 4W at 16Ohm Output power 2W MONO ( 1 x Channel ) , Freq. response 20Hz to 20KHz Speaker size : 1.962" x 3.539" x 1.447" ( Thickness ) , PCB size : 1.62" x 1.42" , All module is tested again before shipping. , Comes with the schematic and diagram how to connect