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.
The Motorola Roadster Pro (Silver) Bluetooth Headset is the King of the Road! Simply clip the Roadster Pro onto your visor and keep your hands on the wheel with hands-free calling and texting. The Roadster Pro is the first 4-mic car speakerphone that includes advanced noise cancellation technology. The Roadster Pro turns on and off using a motion sensor to save battery life, contributing to its 42 day standby time.