Dimension (lxwxh) 65*31*19mmweight (with battery) 105gbattery type 300mah batterytalk time (typical) 2~3 hrsstandby time (typical) 7~8 hrscharge time (typical) <2hrsbluetooth v3.0usb micro usbloudspeaker 1mic 1rated power 2wsnr s/n? 90dbspeaker 27mm 4o 2wdistortion thd<1%resolution ? 55dbtransfer distence 10mpower on/off (long press power button 3 secs)bluetooth connection (a blue led light flashes at 2/s for bluetooth paring mode)bluetooth music play (short press power button to play/pause)bluetooth calls (short press power button to answer calls)bluetooth anti-lost (if connected device leave a safe distence will flow alarm sound)bluetooth camera shutter (press shutter button to take photos)