1. & Easy To Carry The size of this mini portable speaker is 4.32.82inches, it's lightweight that you can easily take it from a party to the park, from your own backyard to high mountains. Owing to its mini size, it can be packed in your bag, stowed in your pocket. You can enjoy your music easily, no matter you wherever you go and whatever you do. 2. Strong Compatibility Bluetooth 5.0 solution provides more efficient and stable wireless transmission with strong anti-interference which is compatible with Android and IOS devices. You can do long bike ride, watching TV shows, and streaming movies for hours, or finish an audio book while you work around the house-all wirelessly and without interruption. The retro bluetooth speaker also supports TF card and USB disk. 3. Good Sound Quality vintage bluetooth speaker customized dual drivers produce 4.5W of huge stereo sound, which tries to guide you into a liver and more fruitful music world. A Digital Signal Processor with dynamic range control ensures high volumes are distortion- and low levels produce rich bass. 4. Long Battery Life The mini bluetooth speaker has a long playtime, which it can play 4-5 hours battery life for playing music on a single charge and over 72 hours standby time with built-in rechargeable 400mAh lithium battery. If you aren't near an electrical outlet, you can still charge your device via some portable battery. As a result, The green small bluetooth speaker will provide you a long-last music journey without worry.