Bluetooth version: bluetooth 4.1 (csr8645 chip)supports hsp, hfp, a2dp, avrcp, aptx protocol reduce noise: cvc 6.0 technology.
Operation distance: up to 10 meters/ 33 feet(free space) earbuds size: 36*30*45mm (1.4*1.2*1.8inch) high-quality built-in 74mah rechargeable li-ion battery
music time: 6 hours (the music volume will affect the time)
charge time: about 1-2 hours
charge port: micro usb
package list: qcy qy19 bluetooth earphone 4 pairs of ear tips charging cable english user manual original qcy package box
Condition: Brand New,