http://www.mobileinfo.com/Bluetooth/FAQ.htm#t6 http://www.mobileinfo.com/Bluetooth/FAQ.htm#t6 Another BlueTooth Faq http://www.mobileinfo.com/Bluetooth/FAQ.htm http://www.mobileinfo.com/Bluetooth/FAQ.htm#t6 Bluetooth LE generally limited to 10 meters http://www.mobileinfo.com/Bluetooth/FAQ.htm#t1