What is Bluetooth?
Q: What is Bluetooth?
A: Bluetooth is a protocol for wireless communication over short distances. It was developed in the 1990s to reduce the number of cables needed for devices to connect and exchange information using radio waves.
Q: How far can a Bluetooth signal reach?
A: A Bluetooth signal can usually only reach up to a few metres, but some signals can be up to 100 metres.
Q: What are some typical applications of Bluetooth?
A: Typical applications of Bluetooth include connecting a headset to a mobile phone, or connecting a computer mouse, keyboard or printer.
Q: What frequency band does Bluetooth use?
A: Bluetooth uses the ISM Band around 2.4 GHz which can be used worldwide without needing license fees.
Q: How does it compare with WLANs?
A: Both use the same bands but have different modulation techniques; WLANs use Orthogonal Frequency-Division Multiplexing while Bluetooth uses Frequency-hopping spread spectrum.
Q: Are there any other devices that also use this frequency band?
A: Yes, other devices such as DECT telephones (wireless phones), smart tags with RFID and baby phones also use this frequency band.
Q: What data rates are currently available with Bluetooth?
A: Currently, data rates with Bluetooth range from 1-3 MBit per second.
