Pure Netherlands. Zero cables.JBL Tune 520BT headphones transmit powerful JBL Pure Bass sound thanks to the latest BT technology 5.3. Easy to use, these headphones offer up to 57 hours of pure pleasure and 3 extra hours of battery with only 5 minutes of charging. Download the free JBL Headphones app and customize your sound via EQ, while voice prompts guide you through headphone functions. Manage calls, sound and volume from the pavilion, thanks to handy button controls. If a call arrives while watching a video on another device, the JBL headphones Tune 520BT passes without problems on your phone, so you will never miss a call. Read and comfy even after hours of listening, JBL headphones Tune 520BT sticks in the backpack to follow you everywhere. SPECIFICATIONSGeneral SpecificationsDriver size (mm): 33Number of Microphones: 1 Audio SpecificationsDriver sensitivity at 1kHz/1mW (dB): 102 dB SPL@ 1kHz 1mWDynamic frequency response range (Hz): 20 Hz – 20 kHzImpedance (ohms): 30 DimensionsWeight (g): 157Weight (oz): 5.54Ear Cup External Height: 1.3Ear Cup External Width (in): 2.9Ear Cup Internal Height (in): 1.3Ear Cup Internal Width (in): 1.3Ear Cup Depth (in): 0.7Ear Cup External Height (cm): 3.2Ear Cup External Width (cm): 7.3Ear Cup Internal Height (cm): 3.2Ear Cup Internal Width (cm): 3.2Ear Cup Depth (cm): 1.7Audio Cable Length (ft): 0.7Audio cable length (m): 0.2 Control and Connection SpecificationsBluetooth version: 5.3Bluetooth profiles: HFP 1.7.2, AVRCP 1.6.2, A2DP 1.3.2Bluetooth frequency: 2.4 GHz – 2.4835 GHzBluetooth modulation: GFSK, π/4-DQPSK, 8-DPSKBluetooth transmitter power: 6 dBm (E.I.R.P) BatteryCharging time (hours from empty): 2Maximum play time (hours): 57 FEATURESHands Free Call: Yes