M&N &reg; New Portable Insulin Cooler 2-8&deg;C Refrigerated Box Drug Reefer Refrigerator Inner Size 173*53*26mm Input voltage/output voltage:100--240V/5.0V Car charger input / output voltage: 12-24V / 5.0V Lithium battery specifications: DC3.7V / 6000mAh Nominal effect: 5W (DC5.0V); 3W (DC3.7V) Temperature range: 2 ~ 8  C (ambient temperature below 25  C)