EXP-7500U2, EXP-7501 COMPANION SPEAKER, SC-50NL CONNECTION CABLE, 2 SS-550 STANDS, COLLAR MIC. AND HEADBAND MIC. W/BODYPACKS. Powerful speaker for its size. Light weight and produces a lot of sound. Used in schools everywhere, comes with companion speaker and covers 700 people. Two wireless receivers built in, two universal mic input jacks, voice over music control, 3.5mm input jack for MP3 player or CD player, ¼? line in and line out, Speech/Music selection for greater range in speech mode, speaker output powers a companion speaker, LED display of battery level and charge condition.