[Up to 165Wx2 Output Power: PA40 audio amplifier use MA5332 chip supports 165Wx2 (4Ω) and 85Wx2 (8Ω) Multiple Protections: PA40 integrated overcurrent overheating under-voltage protections and volume overload protection Built-in EQ and Treble/Bass: PA40 2 channel amp is built-in 6 different preset EQ Treble/Bass adjustment and High Low Gain function Built-in Power Supply: PA40 amp comes with built-in power supply no need to purchase external power adapter Classic Appearance & Easy Operation: SMSL PA40 adopt with classic float window exterior design. Equipped with a full-featured remote control to enhance convenience]