General Specifications Driver size (mm) 8.6 Audio Specifications Driver sensitivity at 1kHz/1mW (dB) 94 dB SPL @ 1 kHz / 1 mW Dynamic frequency response range (Hz) 20 Hz – 20 kHz Impedance (ohms) 32 Dimensions Driver Size 8.6 mm Weight 17.1 g Control and Connection Specifications Bluetooth profiles HFP V1.6, HSP V1.2, A2DP V1.2, AVRCP V1.4 Bluetooth frequency 2.402 GHz – 2.48 GHz Bluetooth transmitted modulation GFSK, π/4 DQPSK, 8DPSK Bluetooth transmitter power 0-4 dBm Bluetooth version 4.1 Battery Charging time (hours from empty) 2 Maximum play time (hours) 8 What's in The Box? 1 x Harman Kardon FLY BT 1 x Charging Cable 1 x Eartips 1 x Carrying pouch 1 x Warranty / Warning (W / !) 1 x Quick Start Guide / Safety Sheet (S / i)