Wifi speaker bluetooth speaker series panasonic all power rating 40 watt effective output 40 watt system 25 way system speaker system 10 mono principle active amplifier type digital power supply rechargeable battery colour white functions clock alarm sleep timer snooze function streaming control feature bluetooth pairing speaker enclosures bass reflex closed number of tweeters 1 treble chassis 25 mm number of subwoofers 1 bass chassis 80 mm