Food temperature measurement range: -20-105 Product shell temperature resistance:300 or more Cell phone can monitor the grilling process of six probes at the same time. Multiple operation modes: recipe/target temperature/estimated cooking time. Stainless steel construction. USB charging, as metal construction cannot be placed in a microwave. 20 minutes quick charge can work for more than 6 hours, full charge takes about 20 minutes, the green light on the base lights up when fully . For some probes that have not been for a long time, the red light not go out after 20 minutes of charging. At this point, the battery should be at least 95% and can be used for approximately 6 hours. In order to protect the battery, 5% be at a very low current, which may take a long time. It may take a long time. Therefore, if the probe is not to be used for a long time, it can be for 20 minutes without recharging. There is no need to charge to 100%. There is little difference in operating time. The maximum operating time is about 8 hours when to 100%. 95% of the operating time can be more than 6 hours. Up to 6 hours or more. Remove the probe from the charging station and insert it into the food. Insert as deep as possible beyond the line. Each grill probe is of the other and the grill mode can be set individually for each probe. In Setup function menu, the system sets 9 food processing temperature values and sets the doneness level. You can also set your own recipe temperature. Please note:the physical slightly color difference or difference, does not affect the use, please do not mind, thank you! Colour:As Shown Material:Stainless steel Package Contents: 1 * Meat Thermometer Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.