1. Adopt TPA3255, QCC3008 Bluetooth 5.0 chip supports APTX, JRC5532 op amp2. The main filter electrolytic capacitor uses 1000UF/50V imported from Japan to ensure strong continuous power support.3. The high-current inductance with red-gray ring for audio is adopted to ensure the sound is clear and powerful.4. The PCB adopts 1.6mm thick double-sided board, 2.0 oz copper thickness, and full tinning process to ensure good passing performance of large and small currents. First-class PCB quality.5. The machine adopts an all-aluminum chassis, and the surface of the chassis is treated with wire drawing oxidation coloring process 6. Input : Analog or Bluetooth inputTPA3255 is a high-performance class D power amplifier, it has class D efficiency and can bring true high-end sound quality. The device features advanced integrated feedback design and proprietary high-speed gate driver error correction function (PurePath Ultra HD). This technology allows the device to maintain ultra-low distortion throughout the audio frequency band while exhibiting perfect sound quality.Parameters:Working method: Class DAmplifier chip: TPA3255Bluetooth version: QCC3008 Bluetooth 5.0, support APTXWorking voltage: AC110V-AC220VThe total output power when the total harmonic distortion + noise (THD+N) is 1% (240W/4)*2The total output power when the total harmonic distortion + noise (THD+N) is 10% (325W/4)*2Size: 240 x 190 x 65mm, antenna length 105mmColour:Photo ColorMaterial:ABSPackage Contents:1 * Bluetooth AmplifierOnly the above package content, other products are not included.Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.