On the base of unchanged Bluetooth baseband protocol,900MHz RF module is also added so that the Bluetooth device can work on either 2.4GHz or 900MHz ISM band.

• 在不改变蓝牙基带协议的基础上；增加蓝牙900MHz射频模块；使得蓝牙设备的射频部分可在2.；4GHz或900MHz的ISM频段间切换。