OLED display: Dual Color OLED display. Better show the data. Multi-direction display: Rotatable multidirectional display. 4 directions, 6 modes, allow you to view your results in any direction. Alarm function: Set the alarm and beep according to your needs. There will be a warning once the measured values go beyond the setting. Know it immediately. With case: Small in volume, light in weight, convenient to carry. With a land yard and carrying case, convenient to use, and to storage. Low-power consumption continuously works for 6 hours. In the absence of a signal, the product will be in after 8 seconds to enter the standby state.