Product description: 1: TX13 is a dual-purpose Bluetooth adapter with optical fiber. Coaxial. 3.5mm Bluetooth transmission and digital to analog. It uses USB5V power supply. When it is powered on, it enters the search and pairing state, and the red light flashes quickly. It can transfer music from mobile phones, walkman, TV, computer and other devices to your Bluetooth receiver, stereo Bluetooth headset, Bluetooth speaker and other devices wirelessly. 2: Can be directly converted into 3.5mm analog signal through the product optical fiber coaxial digital signal, optical fiber coaxial audio input 3.5mm output and speaker, power amplifier and other equipment connected by audio cable to achieve digital analog conversion. 3: Switch the interface light through the button to switch the input interface.Packaging accessories: 1: TX13 host * 1 2: Optical fiber cable * 1 3. Coaxial cable * 1 4: Audio cable * 1 5: Charging cable * 1 6: Manual * 1