... cone technology,neodymium iron boron speaker,perfect quality sound. 5. Dual power,built in 3.7v 500mah lithium battery,external dock 3 ... battery,it can be used as power bank. 6. SIG certified bluetooth V2.1+EDR 7. Using for meeting,travelling,car kit ... , 5PUSB cable can't replace the audio cable.Specifications1. Speaker Power:3W,4Ω 2. battery capacity:600mA,3.7V. 3.Input ...