The unit works fine. There were no instructions on how top operate. Don't know about charging - what the lights mean or only details of the unit. There was also no return address so can't request. Otherwise, it provides nice sound - just don't know op use - that's a major mailing error on seller
Wasnt sure upon arrival, no instructions , no ac power cord in box.. Just usb cord & the speaker..powered up & the initial ka- thunk led to believe " wow" this things got power..turned it on , low volumn, initial disappointment... Was planning to return & a buddy pointed out that the design on the outside was where volumn controls were ! - (yes/ dummy me) was curious where the external buttons like on my other Bluetooth spkrs..- end result - " this thing flat jams"!!..luv it...tremendous bass.. Keepin it !!