This is Nobsound's new power amplifier in 2022. Based on our previous product, we enhance its output power and improve its functionality, while still keep its mini size and elegant design.Despite its mini size(can be hold with one hand), the output power is improved to 100W(50W*2) with the upgraded chip. You will be amazed by its output power compared to its size when you see it.Supporting AUX/USB/Bluetooth input. You can enjoy your music in different ways. The Bluetooth function is also upgraded to 5.0. Now it is more stable and faster.We need to mention that with the USB input, music can be played losslessly(Like connecting with a computer. By the way, you don't need to install a driver). You will be surprised by the sound quality.Prompt and courteous customer service. If you met any troubles or had any questions, please feel free to contact us. [ISED Certification Registration Number: 30459-M1PRO; ISED Hardware Version ldentification Number (HVIN): M1 PRO] Product Description Bluetooth 5.0 Can ensure high quality and stable transmission Powerful Amplifier Can offer 100W powerful output (50W for each channel)Suitable for most home speakers Multiple Inputs Besides Bluetooth input, it also supports AUX & USB inputsCan be used as a PC sound card Classic Design Super mini size can be placed on your desktopSmooth volume control knob Packing List 1× NS-01G Pro Amplifier 1× Power Supply 1× AUX Cable 1× USB Cable 1× RCA Audio Cable 1× Manual Nobsound NS-01G Pro Parameters Colors: BlackBluetooth Version: 5.0Rated Power: 50W*2Channel: 2.0Impedance: 4-8 ohmsAudio input: Bluetooth / USB / 3.5mm AUXAudio output: banana speaker jacksPower Input: DC 9V-24V Dimensions: (L)78 * (W)70 * (H)38mm (3.07 × 2.76 × 1.50 in) Net Weight: 154g / 0.34lb Package Weight: 0.45Kg / 0.99lb Panel Introduction Type Bluetooth Amplifier Bluetooth Amplifier Bluetooth Amplifier Bluetooth Amplifier Bluetooth Amplifier Bluetooth Amplifier Max Power 50W x 2 50W x 2 50W x 2 100W x 2 50W x 2 50W x 2 Channel 2.0 2.0 2.0 2.0 2.0 2.0 Input Bluetooth 5.0 + 3.5mm AUX + USB Bluetooth 5.0 + 3.5mm AUX + USB Bluetooth 5.0 with EDR&DSP + 3.5mm AUX Bluetooth 5.0 with DSP + 3.5mm AUX Bluetooth 5.0 + RCA + 3.5mm AUX + U-disk + TF card Bluetooth 5.0 + RCA + 3.5mm AUX + USB Output Stereo Passive Speakers Stereo Passive Speakers Stereo Passive Speakers Stereo Passive Speakers + Passive Headphones Stereo Passive Speakers Stereo Passive Speakers + Passive Headphones THD ≤0.04% ≤0.04% ≤0.04% ≤0.04% ≤0.04% ≤0.04% SNR ≥98dB ≥98dB ≥98dB ≥98dB ≥98dB ≥98dB Speaker Impedance 4~8ohm 4~8ohm 4~8ohm 4~8ohm 2~16ohm 2~8ohm Power Supply 12V 5A 12V 5A 12V 5A 19V 4.74A 19V 4.74A 19V 4.74A Type Tube Headphone Amplifier MM Phono Tube Preamp USB to Toslink Digital Interface 2(1)-IN-1(2)-OUT RCA Audio Switch ALPS Passive Volume Controller VU Meter & Audio Switch