Optimus Omnidirectional Boundary Microphone
(330-3022)                 Specifications             Faxback Doc. # 56004

Type: .............................. Surface-Mount Electret Bias Condenser

Directivity: ......... Omnidirectional (hemisphere above mounting surface)

Impedance: ........................... 1,000 Ohms +/- 30% dB (at 1,000 Hz)

Sensitivity (at 1 kHz): .......... - 67.5 dB +/- 3 dB (0 dB = 1V/Microbar)

Frequency Response: ....................................... 30 - 18,000 Hz

Current Drain: .......................................... Less than 0.5 mA

Power Requirement: .. One 357A Silver-Oxide Button Cell Battery (supplied)

Cable Dimensions (Length x Diameter):
      (From Microphone to Control Box): ...... 16 Feet (5 meters) x 2.5 mm
      (From Control Box to Phone Plug): .... 4 Feet (1.2 meters) x 1.93 mm

Microphone Dimensions (HWD): ............ 1-5/16 x 3-9/16 x 3-11/16 Inches
                                                        (3.3 x 9 x 9.4 cm)

Plug (Mono): ............................... 1/8 Inch (3.5 mm) Angled Type

Weight (Including Cable): .............................. 10.93 oz. (310 g)

Specifications are typical; individual units might vary.  Specifications
are subject to change and improvement without notice.

(EB 7/19/99)