I.SOUND ConcertBlok Pro User Manual page 3

Play time: 5 hours
Charge time: 3 hours
Frequency response: 100Hz-18KHz
Impedance: 4
Bu on functions
Phone/play/pause
When playing music, press and release to pause the song;
press and release again to continue playing the song. When
receiving an incoming call, press and release to answer; press
and release again to end the call. Press and hold for 3 seconds
to disconnect om Bluetooth® pairing (to allow another user
to connect to the speaker).
Track bu ons
Press the Track back bu on to go to the beginning of the song
currently playing or press multiple times to go to previous
tracks on your playlist. Press the Track forward to go to the
next track on your playlist.
Volume bu ons
Press the Volume down bu on to lower the volume. Press the
Volume up bu on to raise the volume.
NOTE: Pressing the Volume bu ons only control the volume of
the ConcertBlok Pro speaker. Device volume should be
adjusted separately.
Charging your ConcertBlok Pro
NOTE: Make sure that your ConcertBlok Pro Speaker is fully
charged before using it for the rst time.
1. Plug the USB end of the included charge cable into a