Fridge Temperature Alarm Monitoring System c/w GSM Transmission - T20

Power supply: DC12V/1.5A
Inside temperature measure rang: -40°C ~ +125°C, accuracy±0.3°C
Inside humidity measure rang: 0~100%RH, accuracy±2%
External temperature probe measure rang: -55°C ~ +125°C
GSM quad-band, applicable worldwide, 3G optional
Working temperature: -40℃~+70℃
Relative humidity: 10-90%, No condensation
Exterior dimension: 130×130×19mm
All-aluminum panel

2 wired inputs for alarm, configurable alarm/recover SMS
3 relay outputs (DC220V 2A / AC125V 2A)
Power failure/recover alarm
Built-in lithium-ion battery (500mAh/3.7V) which can last 6 hours
Alert buzzer and light
Adopted highly integrated industrial ARM MCU 
Reliable performance with built-in double watchdog
User programmable PC suite
Low maintenance, 24×7 operation