Fangrui Product Details Upgrade Bluetooth 5.3, Equipped With High-performance Bluetooth 5.3 Chip, Low-loss Data Transmission Response Quickly, Anti-interference Stronger, Say Goodbye To Delay, Lag And Other Problems Aux / Rca Red And White Lotus / Digital Optical / U Disk, To Meet The Needs Of Different Devices, Different Audio Interfaces Connect The Old Speaker Or Amplifier Audio Interface, To Solve The Speaker / Amplifier Without Bluetooth, Can Not Use The Bluetooth Playback Problem Support U Disk Playback, Plug-and-play Without Driver Built-in Signal Gain Amplifier, Room Connection Without Dead Space 10 Meters Transmission Sound Quality Without Delay, Signal Stability Without Lag Bluetooth Version: 5.3 Bluetooth Transmission Distance: 10m Support Bluetooth Hands-free Call Function Support Bluetooth Dual Channel Frequency: 2.4ghz Operating Voltage: 5v Interface: 3.5mm Stereo Input Jack Sleep Mode, Energy Saving Power Supply: Use Mini Usb Cable To Charge Working Time: Up To 5 Hours Interface Type: Aux,fiber,rca,u Disk Basic F Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement. Sold by-Dadangjia