Hoco Es64 Ultra Sports Wireless Earphones

"Wireless Version: Wireless 5.3.Frequency: 2.4Ghz-2.48Ghz.Working Range:10 Meters.Battery Capacity: 280Mah.Speaker Size: 10Mm. Impedance: 320+15%.Music Time: About 50 Hours.Talk Time: About 50 Hours.Charging Time: 2 Hours.Frequency Response: 20Hz-20Khz* Hoco Es64 Ultra Bluetooth. Earphones Neckband."