this item:    * 1.The high-definition LCD touch screen is simple and easy to understand,Power display and temperature display making it easier for the elderly to operate.The arc angle design of the inner tank prevents the drugs from bumping in the box during the journey. Sandblasting and anodizing process makes the refrigerating temperature lasting.  * 2. Low power alarm system and with handle design make sure your medicines keep in safe tempreture in time. The Handle design is very convinent for travel.  * 3.Big inner size: 7.08 * 4.17 *1.57 in. Can put in 6-9 insulin pens, or 25 bottles,or 60 refills.Cold storage temperature:  2-8& 8451;(35.6-46.4& 8457;, operating temperature below 25& 8451;(77& 8457;)If the room temperature over 25 & 8451;,the case can`t cooler below 8& 8451;.  * 4.Power supply: USB cable,wall charger,power bank, car, home, storage battery can be used, suitable for travel, home,  commuting, business trip and office.