Firstsing Portable TWS Headphones Wireless Bluetooth Double Earphones Sport Handfree With Charge Box for IOS Android

Single use or Dual use.
Working Distance: 10M
Music play time: 2.5H
Phone call time: 2.5H
Charging time: 1-2H
Battery Capacity: case -- 450mAh, earbud -- 50mAh
With built-in high-performance rechargeable battery, the Bluetooth headphone allow enjoyment of music for up to 2.5 hours on a single charge and 80 hours of stand-by, only take 40 minutes to fully charged. Battery status displayed on IOS device.