Car charger based alarms

Product Specifications
1. Machine Battery: 3.7V 400mAh Li-ion battery
2. Standby time: 12 days. Working time 4-6 days
3. Expansion card; mini TF card
4. Continuous call: 150-180 minutes
5. Network standard: GSM / GPRS
6 .. Storage Temperature: -40 ° C to + 85 ° C
7. Operating temperature -20 ° Cto + 55 ° C
8. The relative humidity range 5% – 95% non-condensing