Despite its compact size, this mini amplifier features an upgraded chip that delivers a powerful output of 100W (50W x 2). Experience impressive sound performance relative to its small footprint. This is Nobsound's 2022 power amplifier model, designed with enhanced output power and improved functionality while maintaining a sleek, compact design. The amplifier supports AUX, USB, and Bluetooth 5.0 input, allowing versatile connectivity options. Bluetooth 5.0 provides a more stable and faster wireless connection. USB input enables lossless audio playback, similar to connecting directly to a computer, without the need for additional drivers. For customer support, please contact the seller through Amazon messaging if you encounter any issues or have questions. ISED Certification Registration Number: 30459-M1PRO ISED Hardware Version Identification Number (HVIN): M1 PRO