Wireless on-ear headphones with JBL Pure Bass sound The JBL Tune 520BT headphones stream powerful JBL Pure Bass sound thanks to the latest 5.3 BT technology. Easy to use, these headphones provide up to 57 hours of pure pleasure and an extra 3 hours of battery with just 5 minutes of charge. Download the free JBL Headphones App and customize your sound through the EQ, while Voice Prompts guide you through the headphones features. Manage calls, sound and volume from the earcup, thanks to the convenient button control. If a call comes in while you are watching a video on another device, the JBL Tune 520BT seamlessly switches to your mobile device, so you never miss a call. Lightweight and comfortable even after hours of listening, the JBL Tune 520BT headphones fold flat in your backpack to follow you everywhere. JBL Pure Bass Sound The JBL Tune 520BT utilizes the renowned JBL Pure Bass sound, the same technology that powers the most famous venues all around the world. Wireless Bluetooth 5.3 technology Wirelessly stream high-quality sound from your smartphone without messy cords with the help of the latest Bluetooth technology. Customize your listening experience Download the free JBL Headphones App to tailor the sound to your taste with the EQ. Voice prompts in your desired language guide you through the Tune 520BT features. Features Up to 57H battery life and speed charge (5mins = 3H) For long-lasting fun, listen wirelessly for up to 57 hours and recharge the battery in as little as 2 hours with the convenient Type-C USB cable. A quick 5-minute recharge gives you 3 additional hours of music. Hands-free calls with Voice Aware Easily control your sound and manage your calls from your headphones with the convenient buttons on the ear-cup. Hear your voice while talking, with the help of Voice Aware. Multi-point connections Allows you to effortlessly switch from one Bluetooth® device to another. You can simply switch from a video on your tablet to a call on your mobile phone, so that you’ll never miss a call. Lightweight, comfortable and foldable design The lightweight materials and soft ear cushions with a padded headband make the headphones comfortable to wear for extended periods. The foldable design makes it convenient for you to carry your headphones anywhere and anytime you want music. Ask Siri or Hey Google Siri or Hey Google is just a button away. Activate the voice assistant of your device by pushing the multi-function button. Specifications Driver size (mm): 33 Number of Microphones: 1 Driver sensitivity at 1kHz/1mW (dB): 102 dB SPL@ 1kHz 1mW Dynamic frequency response range (Hz): 20 Hz – 20 kHz Impedance (ohms): 30 Dimensions Weight (g): 157 Weight (oz): 5.54 Ear Cup External Height (in): 1.3 Ear Cup External Width (in): 2.9 Ear Cup Internal Height (in): 1.3 Ear Cup Internal Width (in): 1.3 Ear Cup Depth (in): 0.7 Ear Cup External Height (cm): 3.2 Ear Cup External Width (cm): 7.3 Ear Cup Internal Height (cm): 3.2 Ear Cup Internal Width (cm): 3.2 Ear Cup Depth (cm): 1.7 Audio Cable Length (ft): 0.7 Audio Cable Length (m): 0.2 Bluetooth version: 5.3 Bluetooth profiles: HFP 1.7.2, AVRCP 1.6.2, A2DP 1.3.2 Bluetooth frequency: 2.4 GHz – 2.4835 GHz Bluetooth transmitted modulation: GFSK, π/4-DQPSK, 8-DPSK Bluetooth transmitter power: 6 dBm (E.I.R.P) Charging time (hours from empty): 2 Maximum play time (hours): 57 Hands Free Call: Yes Charging cable: Yes Foldable: Yes Built-in Microphone: Yes JBL Pure Bass Sound: Yes Multi-Point Connection: Yes Voice Aware: Yes Speed charge: Yes Bluetooth: Yes What's in The Box? 1 x JBL Tune 520BT headphones 1 x USB-C Charging Cable 1 x Warranty/Warning 1 x Quick Start Guide