Bi-directional Sound Experience wider sound stage with Bi-directional room-filling sound. Bass Booster (High Power 500 Watts) Enjoy punching-bass boosting sound with intensified low frequencies of the track. Karaoke Mode Get on the stage and sing like a pop star.   SPECS General Number of Channels 2 Number of Speakers 4 Total Power (W) 240W Special Features Party Lighting PARTY,AMBIENT,DANCE,THUNDER BOLT,STAR, OFF BASS Booster Yes DJ Effect NOISE,FILTER,CRUSH,CHORUS,WAHWAH Karaoke Yes Water-resistant Yes(IPX5) Built-in battery Yes Battery Type Litium-Ion 18650 Battery Life 18hour Features Group Play Yes (Wired/Wireless) Audio Features Sound Mode PARTY, STANDARD(MONO), HIPHOP, EDM, ROCK, LATIN, HOUSE, REGGAE AV Decoding Format WAV Yes MP3 Yes WMA Yes FLAC Yes AAC Yes Connectivity USB Music Playback Yes Bluetooth® Yes Analog Audio Input Yes (3.5mm) Bluetooth® Codec SBC, AAC, apt-X Bluetooth® Multi Connection Yes Bluetooth Power On Yes Karaoke Mic In Yes (x1) Dimensions & Weight Product Dimensions (W x H x D) 13″ x 26.2″ x 11.9″ Package Dimensions (W x H x D) 28.5″ x 14.8″ x 15″ Package Weight 30.4 lb Set Weight (lbs) 26.3 lb Accessory Battery for Remote Controller Yes Remote Controller Yes ETC Built-in Demo Music (Shop Demo) Yes POP Label (3weeks ,only 2weeks for /ZA) Yes Warranty Card Yes