Product parameters : Product Name: DC-DC adjustable power supply module          With a voltmeter display (can be fine-tuned)Product Size: 66 mm *  36 mm *  14 mm          (Length x width x height)Product weight: 23 g (with packaging)Yan color: bluePackaging: single module electrostatic bag packagingMaterial material: FR4 + electronic yuanInput voltage2.5 V- 36 VThe output