Flexible lanyard: Convenient to carry around, enjoy your music or outdoors anytime, anywhere. Strong battery life: Built-in real 4400mAh lithium battery + battery management system, more secure. FM frequency modulation: Can receive 87.5-108 frequency band, listen to the radio, understand current affairs. Directly enter the band or number to search and listen to radio stations and songs, simple and fast operation. Video Playback: Play video and music from U disk or TF card. Good sound quality beyond imagination: 16W power internal magnetic speakers + bass large diaphragm, the combination of the two to create three-dimensional shocking bass, enjoy the passionate sound wave. Stable stand without shaking: Open the stand for easy viewing, you can also watch while lying down. Bluetooth 5.3: Low latency without lag, shielding interference, transmission rate and stability can be greatly improved. Multiple playback methods: Support Bluetooth playback, TF card playback, U disk playback, headphone listening. Parameter: Model No: F55 Speaker configuration: 2 x 1.75 inch internal magnetic speaker Rated power: 2*8W Frequency Response: 100Hz-18KHz Bluetooth version: 5.3 Battery: 3.7V/(4400mAh) Input Power: DC 5V/2A Colour:Gray Material:ABS Package Contents: 1 x radio Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.