The JBL Tune 520BT wireless on-ear headphones offer powerful JBL Pure Bass sound and convenient features for an enjoyable listening experience. Here are the key specifications and features:

General Specifications:

• Driver size (mm): 33
• Number of Microphones: 1

Audio Specifications:

• Driver sensitivity at 1kHz/1mW (dB): 102 dB SPL @ 1kHz 1mW
• Dynamic frequency response range (Hz): 20 Hz – 20 kHz
• Impedance (ohms): 30

Control and Connection Specifications:

• 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)
• Bluetooth version: 5.3

Battery:

• Charging time (hours from empty): 2
• Maximum play time (hours): 57

Features:

• Bluetooth connectivity for wireless convenience
• Quick charging feature provides an extra 3 hours of battery life with just 5 minutes of charge
• JBL Pure Bass Sound for powerful and immersive audio experience
• Convenient button controls on the earcup for managing calls, sound, and volume
• Seamless switching between devices for incoming calls while watching videos
• Lightweight and comfortable design for extended listening sessions
• Foldable design for easy portability and storage
• Voice Prompts guide users through headphone features
• Customizable sound using the free JBL Headphones App
• Multi-Point Connection allows connection to multiple devices simultaneously

What's in The Box?

• JBL Tune 520BT headphones
• USB-C Charging Cable
• Warranty/Warning Information
• Quick Start Guide

With its impressive battery life, superior sound quality, and user-friendly features, the JBL Tune 520BT headphones are an excellent choice for music lovers on the go.