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.
Great Sound On The Go. The JBL GO portable Bluetooth speaker will excite you with JBL quality sound, five-hour rechargeable battery, and noise-cancelling speakerphone, all in a compact box.