Greatnice GTS-1817 5Watt Bluetooth speaker - 14500 battery inside

UPDATE: sound quality is almost OK.
The battery got fully charged with 500mAh measured on 5Volts... so ... about 700mAh capacity, half of the form factor's max capacity ... which is not bad...
The radio works fine, in my room there's poor signal because of all the interference and walls, but outside should be fine.
Mp3 player works as expected. Tried it with a 32GB FAT32 stick, plays music instantly, limited controls are PLAY/PAUSE and NEXT/PREVIOUS ... so you can't jump to another folder or album... just next file.
One last thing, may be specific to my phone, I can't see the battery percentage. Will have to try it with a computer.