Techmade Techbuds Black & Silver Earphones With Charging Box. Take the earphones out of their charging box and connect them to your smartphone or any device equipped with bluetooth, to enjoy its performance! Connect them easily and quickly to your device thanks to their technology and enjoy audio without problems! 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. 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. 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 16? 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