Experience Superior Sound Quality: The AK55 amplifier delivers a robust output power, ensuring rich and powerful sound reproduction. Enhanced with a HIFI system, this amplifier elevates your auditory experience, making it ideal for audio enthusiasts. Bluetooth Connectivity: Seamlessly connect with your favorite devices with the built-in Bluetooth functionality. Stream music effortlessly and enjoy high-fidelity audio from the comfort of your smartphone or tablet. Reliable Power Delivery: the AK55 ensures continuous, distortion-free audio performance at both high and low volumes. Rated power:50X2 Rated frequency:20-20KHZ Resolution:47K Distortion rate:0.5% Signal to noise ratio:80DB Impedance:4-16 Amplifier type:HiFi amplifier Interface type:clip Receiving method:Bluetooth receiving USB drive, audio cable Due to different batches, there may be differences in product printed text, which not affect use. Plug Type:EU Plug,it applies to Indonesia, Germany, France, Spain, Italy and so on.