FM Radio Built-in digital radio chip, stronger signal, listen to more radio stations, with headphone jack, plug in headphones, you can listen to high-fidelity sound quality quietly anytime and anywhere. Bluetooth 5.3 Built-in 5.3 Bluetooth chip, low power operation mode, improve the connection rate and stability. Small size and big volume Small size and big volume, easy to carry and at the same time can meet the needs of a small number of people to use together, indoor and outdoor are good to use. TF Card Playback After inserting the memory card, you can directly switch to the TF card mode to play the pre-stored music in the card. Hands-free calling One key to answer, free your hands, no need to hold the phone can easily and clearly talk. Convenient Wearing Style You can wear it around your waist, in your pants pocket, or in your pocket. Fitness data broadcasting One button to start broadcasting exercise data, fitness steps, calories, to help you keep abreast of your physical condition, understand the fitness data. Specification Audio type: portable bluetooth audio Sound system: stereo Powered passive: active Control mode: button Expanded storage: TF card Bluetooth version: 5.3 Rated Power: 5W Frequency Response: 80Hz-15Hz Signal-to-noise ratio: 45dB Speaker Unit: 1.25 inch Distortion: 0.5 percent Battery Capacity: 500mAH Power supply: lithium battery Functional features: call function, one key answer, voice prompts. Color: Black + Blue Material: plastic Package Contents: 1 x Speaker 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.