Feature: 1. ON/OFF: switch function 2. ℃/℉: Conversion between Celsius and Fahrenheit. 3. HOLD key: In the temperature display state, press this key to keep the LCD display value in the HOLD state, then press Once it resumes temperature detection and measurement. When the HOLD function is executed, HOLD is displayed on the LCD. 4. MAX/MIN memorize the highest and lowest values of temperature, long press Specification: Model: TP400 Size: 26cm length Colour: red/ white Note: Due to differences between computer monitors, the picture may not reflect the actual color of the item.