Powerful Mini 100W Bluetooth 5.0 Amplifier 2.0 : digital amplifier and music player supports Card / AUX / USB / / TF inputs, almost compatible with all home audio devices, such as phone, tablet, computer, TV, set, TF player supports WAV, APE, lossless formats The USB interface supports disks, computers (no need driver) and (with OTG function) Bluetooth 50 achieves a stable and faster transmission rate, TF is convenient to enjoy high fidelity music even on the road or outdoors Adopting classic chip layout, Max output power can reach 50W*2, enough for most home desktop/bookshelf/indoor passive speakers (4-16Ω) The sound is and clear without any sound noise even high Compact structure and exquisite appearance, attractive chassis with LED display and power / switch, very suitable for audio system and desktop use DC 9-24V wide voltage allows use in car or motorcycle 2-Channel Speaker Amplifier, / AUX / USB / Bluetooth 50 / TF Inputs Specification: Bluetooth: 5.0 version Audio inputs: / 3.5mm AUX / Bluetooth / USB / TF Audio output: Banana speaker jacks Support / TF format: MP3, WAV, APE, Max/TF Card Storage: 128g Maximum output power: 50W * 2 (24V / 4Ω charge) Speaker impedance: 2-16Ω Frequency Response: 20Hz-20 Working voltage: DC 9V-24V Dimensions (L * W * H): 110 x 90 x 50mm net: 160g package: 600g contains: 1 digital amplifier 1 User Manual