General Bluetooth Information

1. Bluetooth by nature is a short-range wireless technology.

Bluetooth was initially made for wireless headsets, hence its “range” was never meant to be anything more than the length of a typical backyard.

2. Bluetooth signals are subject to interference.

Much like almost any other modern wireless technology, Bluetooth signals can be negatively affected by things like walls, floors, other wireless devices, or even a human body.

3. There are two types of Bluetooth: Class 1 and Class 2.

Class 1 has longer range (100m/300ft) but drains your battery faster, whereas Class 2 has shorter range (10m/30ft) but is more power efficient.  

4. The range depends on a lot of things.

Things that can affect the range: Bluetooth version, Bluetooth type, Bluetooth profile, device brand & make, location, surroundings, etc. Having bad range doesn’t necessarily mean your device is defective; try it elsewhere before come to a conclusion.

5. “Transmitter” v.s. “Receiver.”

Every Bluetooth connection consists of a “transmitter” and a “receiver.” The “transmitter” sends the signal to the “receiver.” 

There are cases where one device can do both, but it's unlikely that it can do both at the same time.

Here are some examples:

• Transmitters: Phone, Computer (can sometimes use as receiver), TV.
• Receiver: Headphones, Speakers.