Review on Klein Tools AEPJS1 Wireless Speaker for Jobsite, Portable Audio Player & Hands-Free Calls, Durable Worksite Use by Matt Kovacevic

This is by far the best Bluetooth speaker you can buy for $40. 10 hours of battery life is no joke, and the magnet on the back makes it easy to keep music at work no matter what you're doing. The sound quality is also much better than I expected from a $40 speaker. I was glad to find this after looking at too many $60 speakers in stores with 2-4 hour battery life. I have already recommended to several people. The only downside is that it came with a charging cable instead of a USB power adapter, but most people should have an extra one.