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The MB340ES base station is used for the DX340ES digital wireless system. The DX340ES 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.


  • Up to 4 full-duplex or 15 half-duplex beltpack and/or all-in-one headset users per base station
  • Link two bases together to support a maximum of 30 users
  • Single or dual-channel operation
  • 7kHz wideband audios
  • Lost packet concealment
  • Better RF filtering than DX300ES
  • 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

CZ-MB340: 2-Channel Main Station with 2 Headset Positions

CZ-MB340-EU: 2-Channel Main Station with 2 Headset Positions (EU Version)



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

Frequency Response: 200Hz to 7kHz

Security: 64-Bit Encryption

Temperature Range: -4 to 131°F (-20 to 55°C) typical

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 Acceptance: Part 15

Base Station

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

AUX I/O: 600Ω  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


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


8 x 8 x 3.5in (WxHxD)

(203 x 203 x 90mm)


2.75lb (1.25kg) with Battery

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