Welcome to the store! HiFi Audio Quality: The Bluetooth power amplifier board is easy to connect, offering excellent sound quality and a long lifespan. Supports: Supports U-disk and memory card playback, with multi-format decoding (MP3, WAV, APE, FLAC). MP3: sampling frequency: 8~448Kbps, bit depth: 16bits channel, mono stereo; WAV: sampling frequency: 8~48K, Format: MAVima, for Microsoft AD PCM, WAV PCM, bit depth: 16bits; FLAC: sampling frequency: 8~48K, bit depth: 16bits; APE: FAST, NORMAL encoding, bit depth: 16bits. Power and Power Supply: The amplifier uses the MA12070 chip, with an actual output power of 68W per channel, totaling 136W (20V) power supply. It comes equipped with a 12V5A power supply. Output power is 30Wx2 (4 ohm). Amplifier Output: The amplifier is a constant resistance power amplifier, supporting passive speakers of 4 ohm, 6 ohm, 8 ohm, and 16 ohm. It cannot be connected to active audio like computer speakers and is not suitable for passive subwoofers. The 4 terminals at the back of the amplifier are output interfaces. It cannot be connected to 3.5mm headphone jacks or lotus connectors. Available Devices: The amplifier can connect to mobile phones, computers, tablets, laptops, MP3 players, TVs, and projectors with AV audio (lotus jack) or 3.5mm headphone jacks, etc. Most common Bluetooth devices on the market can be connected for wireless transmission. Item Type: Bluetooth Amplifier Material: Aluminum Function Type: 2.0 Stereo Output Power: 50W x 2 (24V 4Ω Load) Working Voltage: DC 9V-24V Bluetooth Distance: Minimum 12m (unobstructed) Bluetooth Protocol: 5.0 Memory Card: Maximum support 128GB (not included) Audio Input: 3.5mm stereo input, RCA stereo audio input, memory card, U-disk USB audio input (can connect to computer, mobile phone, OTG, tablet OTG) 1 x Host 1 x User Manual Your satisfaction is our top priority. We will provide you with the best service. If you encounter any problems after receiving the product, such as damage or incorrect quantity, please contact us immediately, and we will provide you with the best solution!