final --> for primitives --> value can't change. for non-primitives --> you can't change the reference and point it to another object. Note : It is different from immutability.
Hands down, the Bluetooth speaker with the longest battery life is the Fugoo. It offers up to 40 hours of battery life, nearly twice the battery life of other leading Bluetooth speakers in this category. Given how long its battery lasts, you might even forget that the Fugoo needs to be plugged in to charge.
JBL Flip 2 Bluetooth speaker (pictures) Performance. The Flip was one of the better sounding Bluetooth speakers for its size and the Flip 2 takes things up a notch. It's not a big notch, but it's noticeable. The Flip 2 handles bass a little better at higher volumes and has a little bit smoother, cleaner sound.