Description: This Power amplifier comes with 3.5mm AUX/USB/BT 5.0 inputs, compatible with all home audio device such as phone, tablet, computer, TV, set-box, CD player etc Bluetooth 5.0 to realize stable & high-speed transmission speed and greater wireless range, Adopts TPA3116 chip, max output power reaches 50W * 2, easily to drive most home desktop / bookshelf / indoor passive speakers Adopting simple circuit layout, high-quality componets copper gold-plated terminals, the sound is clear and clean, natural,or audible noise even at high output. Super compact with attractive appearance, unique treatment process of case looks high-end and with texture. With input and volume indicators, the working status is clear and distinct, very convenient to use Specification: Type: Digital Power Amplifier Audio input: Bluetooth/USB/3.5mm AUX Bluetooth version: 5.0 Maximum output power: 50W×2 Speaker impedance: 4 Ohm -16 Ohm Working voltage: DC 9V-24V Power specification: 5.5mm/2.1-2.5mm Frequency response: 20Hz-20KHz (±1dB) Signal to noise ratio: ≥98dB Size: Approx.40 x 55 x 60mm/1.6 x 2.2 x 2.4 inch Package Includes: 1x Digital Power Amplifier 1x Manual Note: 1.Please allow 1~3 cm error due to manual measurement, thanks. 2.Due to the difference between different monitors, the picture may not reflect the actual color of the item. Please understand, thank you