Review on 🔊 Olafus Bluetooth Speaker for Outdoor Biking, 5.0 Strong Signal Portable Speaker with Immersive HD Sound, Advanced Built-in Mic, IP65 Waterproof Mini Speaker, 10H Playtime Wireless Speaker for Riding by Robert Pearson

I bought it to attach to my e-bike. The sound is pretty decent for what it is, but it definitely sounds better indoors. My only real issue is that the battery life is nowhere near 10 hours. It might be able to stay on for 10 hours, but that doesn't give you 10 hours of uninterrupted playback at full volume. I think it's closer to 2-3 hours max. 9/23 *Update* I rode my bike out today and found I couldn't hear any sound. I had to shake it several times to get the sound out. When it lights up, you can tell that the speaker is broken. I don't think he can handle heavy songs. Do yourself a favor and buy something from a more reputable brand. The battery life was suspect from the start so I have to downgrade the rating to 3 stars as it ran out of juice after a month. I'm sorry man, you almost made me believe. Now let's see if I can be helped there. They gave me a full refund. Excellent support.