The WRU S20 has the following functions and features:

Details-
Dimension 80*53*21mm
Weight 157g
Input Voltage DC 8~92V/1.5A
Internal Battery 300mAh/3.7V
Power Consumption 30-35mA standby current
Internal Battery Life 2.4 hours at 30 seconds time interval,
- 3.6 hours at 600 seconds time interval
Operating Temperature -20°C~70°C
Humidity 5%~95%
LED Light 3 LED lights indicating GPS/GSM/ext- power status
Button/ Switch 1 power switch (Inside case)
Flash Memory 8MB (GPRS data 20400 units, SMS data 320 units)
Sensor 3D Accelerometer
GSM Module SIMCOM 800C GPS Module Quectel L70K
GSM Frequency Band GSM 850/900/1800/1900MHz
GSM Module SIMCOM 800C GPS Module Quectel L70K
GPS Sensitivity -162dBm
GPS Start Speed Cold start 30s, hot start 2s
Position Accuracy 2.5m
I/O Port 2 Digital inputs – input1 is smart input, can be configured to negative or positive input, default is negative.
- Input2 is positive input for ACC. 1 Analog input, voltage range is 0-12V 1 Output 1 USB port (inside case)