Product Keywords: Features: Plug card radio voice prompt Interface type :USB Battery capacity: 500mAh Frequency response range :60Hz-15KHz Output power :3W Signal to noise ratio: 85 db or higher Power supply: Built-in lithium battery Bluetooth protocol :5.0 Number of speakers :2 Battery capacity: 500mAh Charging voltage: 5V±0.5V Standby time: 200h Effective range: 10 m Operation mode: key Play format: MP3 Shell material: plastic Supported format: TF card Does it have a radio function? Yes Size: 7.6 * 6.1 * 3.8 cm Product weight: 0.133kg Packing list: box instruction charging cable lanyard Features： 1. In Bluetooth mode if the phone suddenly calls press the play button to realize the call the product has built-in WeChat microphone which can provide high-quality hands-free call. 2. The product adopts the new Bluetooth 5.0 technology which is more stable and power-saving and is small in size and convenient to carry. Although the volume is small the volume will make you satisfied. 3. The product has four colors of blue red green and black to choose from which are very suitable for gifts to friends and family members