Description: This mini retro radio sounds amazingly richer and louder without any distortion. Providing long 3 hours of playtime. Convenient for cooking, party, yard work, garage, campfire, hiking, biking or beach, whatever you need it to do. Specification: Name: Retro Blue-tooth Speaker Connection Method: Blue-tooth connection Interface Type: USB Frequency Response Range: 50HZ-20KHZ Output Power: 3w Signal-to-noise Ratio: 90dB Power Supply Mode: built-in lithium battery Sound Channel: 2 Playback Time: 3h Extended Storage: 32GB Blue-tooth: 5.0 Packing List: Retro Radio Blue-tooth Speaker*1 Data Cable*1 Instruction book*1 Note: Please allow slight tolerances in size due to manual measurement, and lighting in photography may result in a difference in color than in real life.