Specification: Product Name: Wireless Eye Mask Circumference: 570-650mm / 22.44''-25.59'' Width: 127mm / 5'' Color: Black, Grey, Dark Blue, Coffee Material: Velvet + Polyester Bluetooth Version: V5.0 Charging Time: 2-3 Hours Using time: About 13 hours (According to the phone volume) Talk time: About 14 hours or more(According to the phone volume) Charging Port: Micro-USB
Feature: -Bluetooth 5.0 chip, can be connected to your mobile phone to enjoy the music. -Built-in microphone for you to answer the phone call. -Comfortable velvet material, more breathable. -Elastic band and hook & loop fasteners, fits most people.