Great speaker for the price I tested this speaker with my One Plus smartphone and Macbook pro laptop via bluetooth and AUX cable for about a week. The speaker also has a small embedded mic. I also used it for voice calling and it worked perfectly without any issues. I would give it 4.5/5. Its pretty loud for its size and connects flawlessly with light indicators. I got 6 working hrs for a full charge. Its not the best and loud sound quality. Its definitely louder than smartphones, laptops and computers so I can compare the sound quality to computer speakers Pros 1. Cheap ($15 when I bought it) 2. Connected to all my devices without any issues (Bluetooth 4.0) 3. Volume control 4. Hands-free calling with the built-in microphone 5. Useful light indicator/connection sounds 6. Aux Input 7. Lightweight and extremely portable. Tiny can fit in the palm of your hand 8. Track changing buttons 9. 12 month warranty and a 30 day money back guaranty Cons 1. Could not connect two devices as advertised 2. Not the best sound quality.