ES621 is a 2G (GSM/GPRS) waterproof GPS asset tracker. Carefully designed for long battery life, it can last 5 years (one report per day) with 7800mAHr battery. Embedded with magnets, it can easily attach to vehicle, trailer, container for asset tracking. It will wake up for reporting location information when it senses moving of the asset and power down itself when it is stationary. It supports TCP/UDP and HTTP for reporting location information. ES621 will automatically switch to cell-ID based location reporting whenever GPS is not available.

Main Functions

● Tracking

● Geofence

● Storing Message

● Moving Wakeup

● Battery Low Warning

● Flexible Battery Warning

● Drop Alarm

● Cell-ID Based Location

● OTA (Over the Air)

● Waterproof Case



Physical and Electrical


Dimensions: 86mm*62mm*33mm

Weight: 286g

Battery capacity: 7800/6000mAh

Supply Voltage: 3.3V~4.5V

Power Consumption:

-Active mode:< 85mA @3.8VDC

-Sleep mode:< 5mA @3.8VDC

-Deep sleep mode:< 15μA @3.8VDC

Operation temperature: -20℃ to 65℃

Storage temperature (Without battery):

-40℃ to 85℃

3 LEDs for charging, GPS and Cellular status;


Built-in Cellular and GPS antenna


GPS Specification

-162 dBm Tracking Sensitivity

Location Technology (56 channel GPS)

Location Accuracy<2.5m (CEP)


Cellular Communication


GSM/GPRS 850/900/1800/1900 MHZ

GPRS multi-slot class 12

Output Power:

– Class 4 (2W @850/900MHZ)

– Class 1 (1W @1800/1900MHZ)

Protocol: TCP /UDP/SMS

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