... distance within 10 meters 2 hands bltetooth telephone with loudspeaker 3 input:Bluetooth,AUX IN,USB Bluetooth speaker detailed description ... in lithium battery with 600 mAh , keep up to paly 6 hours , can repeat charge . 4 , SNR :85DB5 , Three Input mode : Bluetooth ... use full antimagnetic design, do not interference to other goods 10, with CE and BQB cetificate bluetooth speaker, with AUX IN,USB input