Review on 2020 Edition Gray Bluetooth Speaker Backpack: 20-Watt Speakers & Subwoofer for Parties, Festivals, Beach, School - Works with iPhone & Android! by Renee Sweet

Pros: + Appearance and function pleasing, very stylish + Convenient to wear and the seat belt is a nice touch users + Bluetooth speaker, pretty good for party or on the go. You can even take the speaker out of your pocket, but I prefer to just leave it in. It's noisy when you connect a phone with a DAC. + The battery life is really great and it has a power bank to charge all devices which is a big plus. Cons: + The material is likely to be a bit uncomfortable when wet. + It takes a long time to charge to fully charge. + Sound quality needs improvement, too much low treble that sounds harsh and not much bass. Be careful when you blow up the speaker completely or it will distort and sound really bad. The fix for me is to tweak the EQ and add a mini rig subwoofer then it will sound. More than amazing! + mono speaker. I would like it in stereo. Otherwise it has everything you need. All in one. Excellent value for money, highly recommended.