No, infrared is line of sight but bluetooth is not. Hence why if you have a bluetooth tv remote and it gets stuck in the couch, your tv will do crazy things even if it is not pointed at the tv.
Bluetooth
No, it doesn't
It is the same if you have can recharge your battery or you buy disposable, the Bluetooth remote may require a AA battery or a Lithium 3.0V coin battery. It will depend on what type of remote you have.
No, some of them work with bluetooth.
There are reviews for bluetooth headsets on many different online sites. The Consumer Reports site has reviews, as does the CNET home site. One can even find reviews on Amazon.
With Bluetooth some advantages include wireless that does not require a direct line of sight, a maximum range of hundred meters, and the simple ability to pair devices. However, some disadvantages include heavy battery usage for portable devices, and less secure connectivity than infrared.
iPhones are awesome and being able to listen to your tunes at home from it will require Bluetooth speakers. They do make them and you can buy them at Amazon or the Apple store.
Ones that don't require a wire. like bluetooth or wifi.
Some (expensive) landline phones have Bluetooth. Other than that, no.
Logitech and Apple both have the top selling and most popular Bluetooth keyboards. Microsoft also has a premiere line of products that work with third party products for Bluetooth access.
if u want to send music from the PC the fastest way is using a USB cable. If you do not have a cable and wish to use bluetooth then you will require a device called a bluetooth dongle. This will enable your PC to send and receive files such as music via bluetooth.
Bluetooth is designed for very low power use, and the transmission range will only be 10m, about 30ft. Not straight line.