Tender For supply of ict equipment- 4 mic & 1 aux input. built-in mp3 player with usb reader and remote control. bluetooth facility. line output for connecting to a booster amplifier. cut and boost type bass & treble controls. instant transfer to dc power (car battery) if ac power fails., speaker maximum output power 10 watts connectivity technology wired input voltage 100 volts mounting type floor standing, comes with 6 meters of wire with 6 mtrs twin core shielded low noise cable. wide frequency response. high front-to-back rejection for more gain before feedback built-in xlr socket. stand with 5/8 27 tpi to match all microphones., dual pa vhf wireless microphones rf output power 10mw (max.) carrier frequency range 630-664mhz frequency stability modulation mode fm microphone element dynamic, cardioid frequency response 50 power requirement 3v (2 1.5v current consumption < 150ma controls power on/off switch indication channel frequency display dimensions 55 (l 250) mm, speaker wire - copper cable in spool for connecting audio stereo to amplifier, surround sound 50-15,000hz aa pencil cells)