Specification:
usb charging input voltage:5v(500MA current)
speaker rated power output:3W
charging time,it take about 2.5 hours to finished charging
bluetooth version:V4.1
bluetooth transmissio distance:10 meters
bluetooth work in the world-wide 2.4GHz ISM,the use of band(2.4000GHZ-2.4835GHZ)
Built-in kalimba DSP(CVC)data processor,complete digital echo,noise,voice processing
signal-to-noise ratio:90HZ-20K/65dB
Maximum power distortion 7%
support hands-free bluetooth hands-free(HFP protocol)
input power supply: DC5V 300mAh