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The DX300ES system supports hands-free, two-way digital conversations with interfacing for two channels of external radio or intercom communications. Its compact design makes it highly portable and very quick to set up and operate. The MB340ES is a replacement for the MB300ES.


  • Up to 4 full-duplex or 12 half-duplex beltpack and/or all-in-one headset users per base station
  • Link two bases together to support a maximum of 30 users
  • Secure 64-bit encryption
  • Dedicated channel relays
  • 10-pin terminal strip connector for easy connection to 4-wire intercom systems
  • Triple diversity (space, time and frequency) operation for extreme multi-path environments
  • No frequency coordination or licensing for operation
  • Power via 100-240 VAC, 12-14 VDC, 1.5V “AA” batteries or an optional rechargeable BAT850 battery

Item Code

CZ11467: MB300ES base station CZ12030: MB300ES base station EU version (ETSI compatible) CZ12017: MB300ES base station and BP300 beltpack EU version (ETSI compatible)


System Specifications

Frequency Range: All (2400 – 2483.5MHz) Low (2401.92 to 2439.936MHz) High Band (2443.392 to 2481.408MHz)

Frequency Response: 200Hz to 3.5kHz

Security: 64-Bit Encryption

Temperature Range: 4 to131°F (-20 to 55°C) Typ.

Transmit/Receive: Frequency-Hopping, Spread Spectrum (FHSS)

Transmit Power: 100mw Burst

Modulation Type: Gaussian Filtered FSK, TDMA

Frequency Stability: 13ppm

Harmonics/Spurious: Exceeds FCC and ETSI Specifications Over Temperature

RF Sensitivity: <-90dBm w 10-3 BER

System Distortion: <2%

Dynamic Range: -90dBm to –20dBm;

FCC License: None Required (Approved for Worldwide Use)

FCC Acceptance: Part 15

Base Station Specifications

Antenna Type: External, Dual Diversity ½-Wave Dipole, R-TNC Connector (x2)

Power Requirements: 100–240V AC, 50-60Hz or 12-14V DC or Six 1.5V AA Batteries or BAT850 Rechargeable Battery (Optional)

Size: 8 x 8 x 3.5in (20.32 x 20.32 x 8.89cm)

Weight: 2.75 lb. (1.25kg) with Battery

AUX I/O: 600 O Balanced, with Level Adjustment

Headset Connector (x2): Mini-DIN

Headset Output: 200mW into 32W

Relay: 8-Pin Phoenix – NC,COM,NO,GND (x2) 2A @ 30V DC

ETSI Compatibility as of January 1, 2015

The European Telecommunications Standards Institute (ETSI) has mandated a change in the way wireless products operate in the 2.4GHz bands. This new directive, EN 300 328 v1.8.1, requires Clear-Com to modify its DX-Series wireless intercom products and ship only v1.8.1 compliant products into countries that require CE compliance, beginning January 1, 2015.

What is EN 300 328 v1.8.1?

A new ETSI standard to address interference issues within the 2.4GHz ISM band. The main changes relate to how devices communicate and allocate radio space when they are in the same area. A new \"adaptive mode\" is required, which provides a mechanism so equipment can adapt to its environment by identifying other transmissions present in the 2.4GHz band.

How will this affect Clear-Com DX-Series products?

Clear-Com has modified its DX-Series wireless intercom products to be v1.8.1 compliant and created new model numbers for products sold in EU countries. New HME DX-Series EU Model Numbers available here. How do I determine if my BP200, BP 210, WH200, WH220 will work with new EU compliant base stations? Check the G number, which is located on label under the battery, and cross reference to chart above.

Characteristics of new v1.8.1 compliant product:
  • Spectrum-friendly feature will no longer be available.
  • New beltpacks will be backwards compatible with older versions of the base stations.
  • Older versions of beltpacks will not work with new base stations.
  • Testing is more important when installing in order to determine antenna placement and coverage area, particularly when other 2.4GHz equipment is nearby.

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