First I tried the cheap devices found in Thailand from China. I found them to be just that. Cheap and just a pain to use.
With a little research I decided to buy the Braven (BRV-1) outdoor speaker amplifier. Made in China, but of decent quality. It has Bluetooth technology that WORKS.. (LOL). I am getting older and wanted something small, fairly compact with excellent sound reproduction and amplification. This little device fits my needs perfectly.
Used primarily with the Nexus 7. I like the Nexus 7 because it is small, compact and light. Yet big enough for me to see and choose easily.
Of course any phone or device with Bluetooth will work.
After a few months with it. I find the build quality to be perfect!! Not light, but compact, waterproof, and extremely durable. And I do not coddle my equipment. When I buy, I use it, and use it hard.
The battery life is excellent. With a full charge the BRV-1 and Nexus 7 will last me all day. I do not have to worry about water, I can set it a good distance from my Nexus and change the sounds when I want with ease.
Not sure if anyone really reads these blog's. But bottom line is. It is the best device I have ever used so far. If you get a chance I highly recommend it. +++++++++
It doesn't look like much but it is a powerhouse and it JUST works and works well in all conditions so far.