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, WIRELESS EARPHONES Connect them easily and quickly to your device thanks to their technology and enjoy audio without problems! COMFORTABLE AND ELEGANT Thanks to their design, the TM-HP020 techbuds will be comfortable to wear. The shape gives these earphones an elegant appearance, thanks to the arm that descends from the ear insert. SMALL SIZE Thanks to their small size, they are easy to take with you! They don't add unnecessary clutter to your things and, thanks to their case (charging base), it will be difficult for you to lose them. ONE-STEP RECONNECTION Just take the earphones out of the charging case and they will automatically connect to your device (after the first pairing) Speaker 13*3.4mm 16Ω Sensitivity 112±3db Frequency response 20HZ-20KHZ BT Version V5.1 Charge 5V DC 1A Input Load 5V Power 3mW Maximum Power 5MW Operating Distance 10M Earphone battery 40mAh x 2 Li-polymer Power bank battery 300mAh Li-polymer Earphone dimensions 42*12*18mm Power Bank dimensions 58*50*28mm Headphone Weight 5.0 g Please note we cannot offer refunds on products that have been opened, used or synced with a smartphone.