Hoco ES64 Ultra Sports Bluetooth Wireless Neckband

Brand: hoco 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