DFRobot DFR0130-B Panel Meter, 4.5V-30V LED Voltage, 3-Digit, 1% Accuracy, 1.88" W x 1.14" H, BlueMeasure voltage: 4. 5 30V dc Refresh rate: 2 hz Accuracy: 1 percent Dimensions: 1. 88"W x 1. 14"H (face), 1. 80"W x 1. 02"H (rear) This is a standalone DC voltage meter. It measures 4. 5V 30v with 1 percent accuracy, best suitable for battery level display. Just apply two wires on the power without any extra circuit or components; it gives the reading straight away. Easy to use, and good company with robot application.

selectable via the push button on the front panel

max output) overshoot

FFT (Fast Fourier Transform) FFT windows Rectangle

Product Dimensions (L x W x H): 8

5Hz to 500KHz (sine 1MHz)

Temperature Meter and Digital Multimeter

usable to +30 dBm power level range

Package includes:

Installed 9V battery

but the additional wave tracking

MAX/MIN/MAX-MIN value

8-pole DIP switch: one side of all eight switches connected and switchable to +5V or ground