features: • wide frequency response • tiny & light • reliable & rugged • minimum rubbing noise • easily hidden • conveniently attached with a wide assortment of clips tr50 mic head specifications: • size: .18" x .300" x .55" (4.57 x 7.6 x 14 mm) [does not include strain relief] • type: omni-directional electret condenser • frequency response: 40-16000 hz • noise level: 26db equivalent to spi • maximum spl: 134db • output level: -57db • nominal impedance: 3000ohm • operating voltage: 1.5vdc • current drain: 20-30 microamps tr50 standard accessories included with microphone : • tr-bcoh mic holder with vampire pins, • tr-bcc case, hard, • tr-btb tie bar, • tr-btt tie tac, • tr-bws windscreen, foam with plastic frame, • tr-tr79lm power supply for tr50 lavalier mics