General Specifications Driver size (mm) 12 Number of Microphones 4Audio Specifications Driver sensitivity at 1kHz/1mW (dB) 110 Dynamic frequency response range (Hz) 20 Hz – 20 kHz Impedance (ohms) 32 Dimensions Charging Case Weight (g) 38.6 Charging Case Weight (oz) 1.4 Earpiece Weight (g) 9.6 Earpiece Weight (oz) 0.3 Control and Connection Specifications Bluetooth profiles A2DP V1.3, AVRCP V1.6, HFP V1.7 Bluetooth frequency 2.4 GHz - 2.4835 GHz Bluetooth transmitted modulation GFSK, π/4-DQPSK, 8DPSK Bluetooth transmitter power <11 dBm Bluetooth version 5.2 Battery Charging time (hours from empty) 2 Maximum music play time with ANC off (hours) 8 Maximum music play time with ANC on (hours) 6 Maximum play time (hours) 32 Maximum talk time (hours) 4.5 What's in The Box? 1 x JBL Tune Flex earbuds 1 x Charging case 1 x USB Type-C charging cable 1 x open eartip 1 x 3 sizes of sealing eartips 1 x Warranty / Warning (W / !) 1 x Quick Start Guide / Safety Sheet (S / i)