JBL Tune 770NC Over-Ear Bluetooth Noise Canceling Headphones (Four Colors)

https://live.staticflickr.com/65535/52866685671_34721b9b52_z.jpg feature: ●The latest Bluetooth 5.3 technology, transmission of high-quality sound ●Powerful JBL Pure Bass sound effect ●Quick charge for 5 minutes can be used for 3 hours ●Battery life up to 70 hours ●Multi-point connection, allowing you to quickly switch to another device ●Lightweight, comfortable and foldable design, convenient for you to carry headphones to listen to music anytime and anywhere ●APP supports custom EQ and voice prompts Product Specifications: Bluetooth version: 5.3 Driver unit: 40mm Headphone weight: 230 g Headphone battery type: lithium-ion battery (690 mAh / 3.7V ) Charging time: about 2 hours from fully charged Frequency range: 20Hz -20kHz Sensitivity: 100dB SPL@1mW Nominal Impedance: 32 ohms Maximum sound pressure level: 94dB Microphone sensitivity: -40dBV/Pa Time to use with Bluetooth on: 70 hours (Increase or decrease due to volume and audio) Packaging and accessories: Headphone x 1 audio cable x 1 USB Type-C charging cable x 1 Quick Start Guide x 1