S.M.S.L A100 Amplifier Bluetooth 5.0 Small Power Amplifier HI-FI Speaker for "MA12070" Amplifier IC Equipped 2.2ch 2.1ch 2.0ch Class D Audio Digital Amplifier Integrated Amplifier Operation confirmed until 2026/1/3. Selling due to system replacement. There are no noticeable scratches or stains, but please check the photos and purchase after understanding the condition. Please refrain from purchasing if you are nervous, as this is a used item. Please refrain from cancellations, returns, and claims after purchase. The following is a quote from the product description: ・Equipped with the new "MA12070" amplifier IC, this latest circuit design achieves an even higher 0.005% ultra-low distortion rating for the A100, and with 92% energy conversion efficiency, it provides high-quality sound and excellent audio performance! ・Combines aesthetics and practicality, supports Bluetooth 5.0, and has no antenna! Unlike previous models, there are no external removable parts, and the A100 is completely integrated with a built-in Bluetooth antenna, further increasing the stability of the signal flow. Does not support apt-x. ・Supports USB audio playback, no need to install drivers! Easily connect to your computer and play your favorite songs! ・Two output terminals for ultra-low frequency signals, you can configure a 2.0ch Hi-Fi sound system, or a 2.1ch or 2.2ch sound system that also provides sufficient low-frequency volume, it's up to you! ・No need to worry about electricity bills when placing the A100 in standby mode! Low power consumption that meets the latest EU ErP2 standards!