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.
WONFAST The World's Smallest Magical and Portable Multifunction Wireless Bluetooth Speaker with Bluetooth Remote Shutter,Anti-theft device of phone,Impressive Sound Quality You Never Imagine,Great for Listening Music,Taking self-portraits, Bluetooth Chat-(Yellow) Only 15 left in stock - order soon.