Olympus DM-720Boundary Mic Kit

Olympus DM-720 Boundary Mic Kit Large (Meet & Record Kit / Edition large) combines the DM-720 digital voice recorder with two ME33 omni-directional boundary microphones for conference and meeting capture. This is not the Standard kit (one ME33).

Key Features

• Kit Large composition: DM-720 recorder + 2× ME33 boundary microphones (Olympus Europe press release: Meet & Record Kit / Edition large)
• DM-720: TRESMIC 3-microphone system; Linear PCM and MP3 recording; 4 GB internal memory; microSD up to 32 GB
• DM-720: five preset recording scenes; zoom microphone; voice balancer; calendar search; built-in USB
• ME33: omni-directional electret boundary mics purpose-built for distant / conference voice capture
• Multiple ME33s can be combined via the bundled connector for expanded mono/stereo conference setups (per ME33 datasheet)

Kit identity

Olympus Europe lists Available Kits for the DM-720: Meet & Record Kit / Edition small includes one ME33; Edition large includes 2× ME33. Audico pid 44944 is the Large kit; pid 44943 is the Standard (1× ME33) and must not be mixed.

Specifications

Sources: Olympus Europe DM-720 press release (kit composition + recorder feature list); Olympus ME33 Boundary Microphone datasheet; Olympus DM-720 product datasheet (recorder detailed specs).

Kit composition

Kit name	Meet & Record Kit / Edition large (Boundary Mic Kit Large)
Included recorder	Olympus DM-720
Included microphones	2× Olympus ME33 boundary microphones
Not this SKU	Edition small / Standard kit with 1× ME33 (Audico 44943)

DM-720 recorder

Recording formats	Linear PCM / MP3
Internal memory	4 GB (max recording time approx. 985 hours in MP3 8 kbps per press release / datasheet)
External memory	microSD / microSDHC up to 32 GB
Microphone system	TRESMIC (3 highly sensitive microphones)
Internal microphone frequency range	20 Hz - 20 kHz (press release; datasheet: centre mic ON)
PCM frequency response	48 kHz: 20-23,000 Hz; 44.1 kHz: 20-21,000 Hz
MP3 frequency response (examples)	320 kbps: 20-21,000 Hz; 128 kbps: 20-17,000 Hz; 64 kbps mono: 20-13,000 Hz; 8 kbps mono: 20-3500 Hz
Recording scenes	Lecture / Conference / Meeting / Dictation / Speech-Recognition (DNS)
Folders / files	5 folders; up to 200 files per folder
Display	Full-dot matrix LCD; approx. 1.36-1.43 in (datasheet / press release)
Speaker	ø18 mm round dynamic; max output 150 mW
Microphone / earphone jacks	3.5 mm mic (2 kΩ); 3.5 mm earphone (8 Ω min.)
Power	1× AAA alkaline or Ni-MH; USB charge (Olympus rechargeable); optional A-514 AC adapter
Battery life (recording)	Up to 52 hours (MP3 8 kbps, alkaline)
Dimensions (H × W × D)	105.9 × 39.6 × 14.4 mm (without protrusions)
Weight	72 g including batteries
USB	Built-in / direct USB connection

ME33 boundary microphone (each; kit includes two)

Directionality	Omni-directional
Microphone type	Electret condenser
Impedance	2.2 kΩ
Sensitivity / gain	−35 dB at 1 kHz
Frequency response	70-10,000 Hz (as printed on ME33 datasheet; verified visually)
Microphone jack	3.5 mm ø / impedance 2.2 kΩ
Dimensions	120 mm ø × 23 mm
Cable length	2 m
Weight	110 g

Datasheets

Public manufacturer documents (link only - this does not add a downloads module):

• Olympus Europe DM-720 press release (kit composition)
• Olympus ME33 Boundary Microphone datasheet (PDF)