Check the listing for details. JBL Tune 520BT Wireless Bluetooth On-Ear Headphones. Condition: New. Listed at 34.95 USD. For Commutes and Everyday Listening JBL Pure Bass Sound Bluetooth 5.3 Technology Up to 57 Hours of Battery Life 5-Minute Fast Charge for 3 Hours of Play Multipoint Connections Lightweight, Comfortable, and Foldable Hands-Free Calls and Google/Siri Prompts Customizable EQ via JBL Headphones App Includes USB-C Charging Cable 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 Specifications: Power supply: 5 V, 1 A Frequency response: 20 Hz – 20 kHz Impedance: 30 ohm Sensitivity: 102 dB SPL@ 1kHz 1mW Maximum SPL: 95 dB Microphone sensitivity: -40 dBV@1kHz/Pa Maximum operation temperature: 45 °C Bluetooth transmitter modulation: GFSK, π/4-DQPSK, 8-DPSK Bluetooth version: 5.3 Bluetooth profile version: HFP 1.7.2, AVRCP 1.6.2, A2DP 1.3.2 Bluetooth transmitter frequency range: 2.4 GHz – 2.4835 GHz Bluetooth transmitted power: 6 dBm (E.I.R.P) Driver size: 33mm / 1.30" Dynamic driver Headphone Cable Length (m): 1.2 battery type: Lithium-ion battery (3.7V / 450 mAh) Charging time: 2 hrs Music playtime with BT on: up to 57 hrs