bids are invited for 2200000890 - table top microphone chairman unit microphone: 63dbv/µbar (7.5mv/pa)current consumption: < 50ma max.,mic auto switch-off time: 75 seconds approx.input/output: line/line, headphone speaker: max input 300mwcontrols:priority switch, talk switch, speaker volume control, headphone volume controldimensions: w118 × h70 × d160 mm make:-ahuja,shure,bosch , 2200000891 - table top microphone delegate unit microphone: -63dbv/µbar (7.5mv/pa)current consumption: < 50ma max.,mic auto switch-off time: 75 seconds approx.input/output: line/line, headphone speaker: max input 300mwcontrols: talk switch, speaker volume control, headphone volume controldimensions: w118 × h70 × d160 mm make:-ahuja,shure,bosch , 2200000892 - uhf handheld cordless mic with receivertransmitterrf output power: 10mw (max.),frequency stability: ±0.005%,microphone element: dynamic, cardioid,frequency response: 50-15,000hzpower requirement: 3v (2 × 1.5v aa pencil cells),current consumption: = 150maindication: channel frequency display receiver,audio output: bal. 0dbu, unbal. -10dbus/n ratio: 100db,distortion: =1%,frequency response: 50-15,000hzindications: leds for rf & audio signal, channel frequency displaydimensions: w210 × h47 × d165 mm make:-ahuja,shure,bosch , 2200000893 - speaker system (ceiling speakers or wall mount) input power: 40w rms,power taps on 100v: 40/20/10w,impedance: 250/500/1kofrequency response: 90-18,000hz,spl at 1khz (1w/1m): 93dbspeaker: woofer 200mm (8”), tweeter 25mm (1”)dimensions: ø272 × h120 mm make:-bosch/bose/jbl , 2200000894 - system control unit( central controller)line output 1 & 2: 17.5v dc/3a max.; -34dbv (20mv)power output: 50w rms at 2% thd, 90w max.inputs:3×mic 0.65mv/4.7k?, 1×aux 100mv/470k?frequency response: 60-14,000hz (± 3db),s/n ratio: > 60dbtone controls: bass: -10db at 100hz, treble: -10db at 10khzpreamp output: 200mv/600?,line output: 1v/1k?send output: 200mv/600?,return input: 200mv/10k?speaker output: 4?, 8?, 16?, 70v & 100v make