Thank you for viewing our products. Instant purchase is welcome. Thank you. This is a 2-in-1 amplifier, combining a Bluetooth receiver and a power amplifier (Headphone Amplifier). It connects wirelessly to speakers from your smartphone, etc. (PSE/Technical Conformity Mark certified) Despite its mini size, this product is a 2023 version upgrade, with a higher-grade chip, resulting in significantly improved sound quality and performance compared to the original version. It uses a special Nousound chip, with a maximum power output of 100W (50*50W), easily driving most home speakers. Experience HIFI clear and delicate sound, with almost no noise even at high volumes. With Bluetooth 5.0 / 3.5mm AUX / USB input, it can be easily connected to smartphones, tablets, PCs, TVs, CD players, decoders, preamps, etc. The USB input requires no drivers, making it very convenient. Enjoy immersive sound with the 50Wx2 high-power amplifier! Especially for movie enthusiasts, this is a must-have device among many similar products. Note: To achieve high power, a DC12V or higher power adapter is required.