Feature: 1. Easy Connection: HiFi sound quality bluetooth power amplifier board convenient connection, excellent sound quality, long service life, can give you a long time to accompany. 2. Long Transmission Distance: Bluetooth 5.0 transmission scheme, signal stability, long transmission distance, intelligent compatible with more than 99% of devices, to meet different application needs. 3. Direct Reading Function: The power player is equipped with U disk, small memory card can read directly, you can copy your favorite music to the U disk, small memory card to play. 4. Powerful Chip: The maximum output power can reach 80W+80W, enough to meet most of the household desktop, bookshelf indoor passive speaker (4‑16Q). The sound is clear and clean, without any audible noise even at high output. 5. Connected Devices: It can connect mobile phones, computers, tablets, laptops, MP3, TVS and projectors with AV audio or 3.5mm headphone output hole, etc. Mainstream Bluetooth devices on the market can be connected to achieve wireless transmission. Specification: Item Type: Mini Power Amplifier Weight: 300g/10.6oz Product Material: ABS Feature Type: 2.0 stereo Output Power: 2 x 50W(24V 4Q load) Operating Voltage: DC9V-24V Bluetooth Distance: at least 12 meters (barrier free) Bluetooth Protocol: 5.0 Audio Input: 3.5mm stereo input, RCA stereo sound input, small memory card, U disk USB audio input (can connect to computer, mobile phone,OTG, tablet OTG). Package List: 1 x Mini Power Amplifier1 x Instruction Manual