Specifications:

• The Voltmeter Resolution: ±0.1V
• The Voltmeter Digital Display Range: 0v-45v
• The Voltmeter Input Voltage Range: Dc 4v-40v
• Output Voltage: Continuous Adjustable (1.3v-37 V)
• Output Current: 2a
• size :65*35mm
• Led Digital Voltmeter Tube, The Accuracy Is Adjustable Function, Can Be Aimed At Your Multimeter Adjustable Accurate.
• Press the key "S1" to let the display show the input or output voltage. when the green led light, it shows output, the red show input.

Note:

1. To guarantee the accuracy of the voltmeter , make sure the input voltage above 4V.
2. The input voltage must be 1.5v higher than the output voltage or 1.5v above.