Take the earphones out of their charging box and connect them to your smartphone or any device equipped with bluetooth, to enjoy its performance!   TECHBUDS, AUDIO AT YOUR FINGERTIPS! Remove them from their charging box and connect them to your smartphone or any device equipped with bluetooth, to enjoy its performance! PRACTICES Practical and comfortable to wear, the TechBuds can also be worn during sports. PORTABLE Thanks to their small size, they are easy to carry with you always! They do not add unnecessary clutter between your things and in addition, thanks to their case (charging base) it will be difficult for you to lose them. CALL AND MUCH MORE You can listen to music and talk on the phone comfortably thanks to these small headphones. Thanks to the interactive button, everything will be easier!   Speaker Ø10mm-16Ω SNR 80dB Frequency response 20HZ-20KHZ BT Version V5.0 Working range 10M Earbuds Battery 40mAH x 2 Li-polymer Charging case Battery 350mAH Li-polymer Please note we cannot offer refunds on products that have been opened, used or synced with a smartphone.