Sony Clie Gear PEGA-MSB1 Operating Instructions Manual page 47

1)
Actual range will vary depending on factors such as obstacles between
devices, magnetic fields around a microwave oven, static electricity,
interference, radio wave conditions, reception sensitivity or antenna's
performance, and operating system or software application, etc.
2)
Bluetooth standard profiles specify the usage purpose for Bluetooth devices
communicating with each other.
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