30 hours straight with mid volume level. in pune, there are around 5 to 6 fm channels and are enough, no need for additional usb or memory card slot to listen music from other usb sources. audio quality is pleasant, its mono speaker and it reminds me sound of old fm radios and loved this thing very much. its a combination of old type and modern battery backup feature. size it fits perfectly anywhere in kitchen and its easy and straight operation makes it more likable, you need to be very accurate to set the correct frequency as this product does not comes with the fine tune feature, but i am ok with it,overall, i liked this product very much, considering its price, it delivers full value .