It uses 2.4GHz ISM (Industrial, Scientific, Medical) band which can be used for free without permission from FCC and various terminals can connect in maximum 10m(currently being improved to 50m) with 1Mbps speed (real efficient rate is asynchronous 721K).

Wireless communication method is using spread spectrum technology with Frequency Hopping method which configures 79 channels of 1Mhz in 2.4GHZ frequency band and changes channel 1600 times per second.

Profile is standard classified according to use of protocol and defined operation sequence. Now, there are 13 types and being extended. Additionally, each chip company have progress unitizing Bluetooth chips for low power consumption, making smaller, low price of Bluetooth modules.

_ Development steps of Bluetooth solution
5chips(prior to 1998 ) - CPU, RAM, Flash, Baseband, Radio
3chips - Flash, Link Controller(Baseband+CPU+RAM), Radio
2chips - Link Controller(Baseband+CPU+RAM+Flash), Radio
1chips - All in one