? Refrigeration Space(L*W*H)? 6.69*2.16*0.9inch;.Dimensions(L*W*H):7.36*3.15*2.67inch 【Cold Storage Temperature? 2-8??35.6-46.4?, operating temperature below 25??77??If the room temperature over 25 ??the case can`t cooler below 8?. 【Max Working Time? 8 hours after full chargerd--Battery indicator flashing while charging, Unplug the power cable to check the electric quantity. -Insulin Cooler Box is designed to provide a convenient and affordable way to keep medicines (such as insulin or other medicines that are injected,) at a safe temperature 【Sensing Refrigeration(Semiconductor)】. Don`t use the thermometer to measure it, the temperatures of the case`s bottom should be lower than air. The "medicine bottle" direct-contact the bottom , so the medicine direct-contact the bottom refrigeration.If you sent at 2?( on screen display 2?)?the bottom is acturally 2?. If you use thermometer to measure, you just measure the temperature of the air, not the acturally refrigerating temperature ? Don't forget to Close ? Avoid exposes medicines to extreme temperatures . Luggage compartments, Hotel rooms (when guests are out of the rooms, climate control is often turned off),Taxis, Airlines, and other forms of transportation. Work and Home:Many work environments reach extreme temperatures; even climate controlled areas can be shut off at the end of the business day. Most people prefer privacy for their insulin storage, rather than placing it in a shared refrigerator