Communication Modes
UPD Packet data and SMS

Location Technology
50 channel GPS

Operating Voltage
12 and 24 volt vehicle systems


Location Technology
50 channel GPS (with SBAS)

Location Accuracy
2.0 meter CEP (with SBAS)

Tracking Sensitivity

Acquisition Sensitivity

AGPS Capable


Data Support
SMS, UDP packet data

Operating Bands (MHz)

  • 850/900/1800/1900


  • 850/1900


  • 800(VI)/850(V)/900(VIII)/1700(IV)/1900(II)/2100(I)

Transmitter Power

  • 850/900, 32.5 dBm
  • 1800/1900, 29.3 dBm


  • 850, 24 dBm
  • 1900, 23 dBm


  • All bands, 23 dBm

HSPA Data Rates
5.6 Mbps upload/7.2 Mbps download

HSPA Fallback
EDGE/GPRS/GSM quad band
3GPP Release 6

Comprehensive I/O

Digital Outputs
1 open collector (200 mA)

Analog Inputs
1 internal VCC monitor

Status LEDs
GPS and cellular


-30º to +75º C (operating); -40º to +85º C (storage)

95%RH @ 50º C non-condensing

Shock and Vibration
U.S. Military Standards 202G and 810F, SAE J1455

SAE J1113; FCC–Part 15B; Industry Canada

RoHS Compliant


Operating Voltage
6-32 VDC

Power Consumption
<2 mA @ 12V (deep sleep) <10 mA @ 12V (sleep on network with SMS) <20 mA @ 12V (sleep on network with GPRS) <70 mA @ 12V (active standby)


2.1 x 3.6 x 0.77”, (53 x 96 x 19mm)

3.7 oz, (106g)

Connectors, SIM Access

Connection Type
Captive 6 wire harness

SIM Access


Fully certified FCC, CE, IC, PTCRB, Applicable Carriers


Tie-wrap or adhesive

Key Features

UDP and SMS-based messaging
Internal GSM and GPS antennas
Super sensitive GPS (-162 dBm)
Internal back-up 200 mAh battery
Ultra-low power sleep mode (<2mA) Internal buzzer Built-in starter interrupt relay Voltage monitoring and low battery notification 2,000 buffered messages 10 Built-in geo-fences PEG™ exception-based rules Automatic, over-the-air unit configuration on power-up (PULS™) Over-the-air firmware download (PULS™) Web-based device management (PULS™)

Optional Features/Functions

3-axis accelerometer for motion sense and tilt

Development Support Options

Customized hardware and software development available on request
Download the LMU-400 Datasheet

Competitive Price, Competitive Technology, Competitive Edge

The LMU-400 high-value tracking unit from CalAmp features a small size, superior GPS performance, an internal 200 mAh back-up battery, ultra low power sleep modes, optional 3-axis accelerometer for motion sense, and an integrated buzzer and starter interrupt relay. The LMU-400 is a complete vehicle tracking and communications device incorporating next-generation, super-sensitive GPS technology on GSM/GPRS/CDMA 1xRTT and HSPA cellular networks for installation in any 12 or 24 volt mobile vehicle. Superior internal antennas for both cellular and GPS eliminate the need for wired antennas and make the LMU-400 mountable virtually anywhere in the vehicle for easy, inexpensive installations. Messages are transported across the cellular network using enhanced SMS or UDP messaging providing a reliable communications link between the device and your application servers. The LMU-400 is designed to dramatically reduce cost cost of ownership, power and size while providing excellent field reliability.


The LMU-400 employs CalAmp’s advanced industry leading on-board alert engine, PEG™ (Programmable Event Generator) to monitor external conditions and support customer-defined exception-based rules to meet your application requirements. PEG monitors the vehicle environment and responds instantaneously to pre-defined threshold conditions related to time, date, motion, location, geo-zone, input and other event combinations. This behavior can be programmed by CalAmp before shipment, at a customer’s facility, or over-the-air once the unit has been fielded.

Over-the-air Serviceability

The LMU-400 leverages CalAmp’s management and maintenance system, PULS™ (Programming, Updates, and Logistics System), for over-the-air configuration parameters, PEG rules, and firmware. This out-of-the-box hands free configuration and automatic post-installation upgrades can monitor unit health status across your customers’ fleets to identify issues before they become expensive problems.