--Using Bluetooth-compatible 5.0 chip; --Support TF card reading function: it can copy data and other operations on the computer; --Built-in 160mAh capacity battery: it can listen to continuously for about 5~6 hours; --Built-in high-quality decoding chip: high-definition stereo sound quality (supports sound quality comparison of similar products); --Size: 75 x 25 x 10mm