 The bit rate is 1 Mbit/s (with an option of 2 Mbit/s in Bluetooth 5), and the maximum transmit power is 10 mW (100 mW in Bluetooth 5).Further details are given in Volume 6 Part A (Physical Layer Specification) of the Bluetooth Core Specification V4.0.Bluetooth Low Energy uses frequency hopping to counteract narrowband interference problems.