ES311 is a 3G (W-CDMA) waterproof GPS tracker. It supports TCP/UDP and HTTP for reporting location and sensor information. Other than the basic feature of location report, it can be integrated with relay, camera, RFID reader, fuel sensor, humility sensor, flow meter and many other sensors with 5 IOs (factory configurable combinations of up to 3 digital inputs, 2 digital outputs, 3 analog inputs (A/D), 1 UART or 1 RS232C). It can work in humid environment because of its waterproof design.

Main Functions

● Tracking

● Geofence

● Backup Battery

● Over Speed Limit

● Mileage

● 3-Axis Accelerometer

● Storing Message

● Power Saving Mode


● Waterproof Case

● OTA (Over the Air)


Physical and Electrical

Dimensions: 89mm *47mm *18mm

Weight: 69g (without wire) 147g(with wire)

Input voltage range: 9-36VDC

Power consumption:

– Active mode: < 43mA @12VDC

– Sleep mode: < 17mA @12VDC

Operation temperature: -20℃ to 65℃

Storage temperature (Without battery):

-40℃ to 85℃

GPS Specification

-157dBm Tracking Sensitivity

Accuracy(Open Sky):< 2m (CEP50)

Comprehensive IOs

3 inputs and 2 outputs

1 A/D input and UART

2 LEDs for GPS and Cellular status

Built-in Cellular and GPS antenna

Cellular Communication


ES311A(USA): 850/1900 MHz

ES311JE(Japan/Softbank): 900/2100 MHz

ES311J(Japan/Docomo): 850/2100 MHz

ES311E(Other Countries):900/2100 MHz

Output Power: 0.25W


850/900/1800/1900 MHz

Output Power:

GSM850/900: 2W

DCS1800/PCS1900: 1W


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