Digital LED Automobile Voltmeter with USB Port for Device Charging, Car Battery Monitor This is a sturdy Aluminum

This is a sturdy Aluminum Alloy Folding Bed/Lawn Chair

You can change the pitch of the tune by using the Frequency Range switch

which allows users to conduct waveform observation and data storage controlled by remote PC

Vertical adjustable: Yes

Insulation Thickness: 0

Digital LED Automobile Voltmeter with USB Port for Device Charging, Car Battery Monitor This is a sturdy AluminumLow power consumption Bright red LED display Built in USB port for charging your small devices such as a phone or tablet Black ABS casing USB maximum output current: 2. 1A This 2 in 1 voltmeter plugs into your car's auxiliary power outlet to provide a readout of the car battery and a USB port for charging your small devices such as a phone or tablet. It is easy to install, has very low power consumption, and features a bright red LED display. What