-Condition: Used / Great -Description: Headphones have been cleaned and sterilized. No major stains, scratches or damages. Fully functional -Please see photos for complete condition details -Does include aftermarket usb-c charging cable -Model: JBLT520BTBLKAM -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. Lightweight and comfortable even after hours of listening, the JBL Tune 520BT headphones fold flat in your backpack to follow you everywhere. -Driver size (mm) 33 -Microphone: 1 -Driver sensitivity at 1kHz/1mW (dB) 102 dB SPL@ 1kHz 1mW -Dynamic frequency response range (Hz) 20 Hz – 20 kHz -Impedance (ohms) 30 -Bluetooth profiles: HFP 1.7.2, AVRCP 1.6.2, A2DP 1.3.2 -Bluetooth frequency: 2.4 GHz – 2.4835 GHz -Bluetooth version: 5.3 -Charging time (hours from empty): 2 -Maximum play time (hours): 57