I12 iPod Tws Wireless Bluetooth headphones earphones earbuds, adopted latest Bluetooth technology, upgraded acoustic components produce the highest fidelity music, strong patented structural design and superior quality Components, wont let you down easily. Model i12 Blue tooth V5.0 Communication distance 10m Call time 3 hours Music Time 4 hours charging time 1hours Headphone battery 300mah charging battery 30mah weight earbuds 30g Show More Show Less