Extech VFM200 VOC/Formaldehyde Meter, Green

Large backlit LCD display simultaneously displays four channels Selectable data sampling rate: 1, 2, 5, 10, 30, 60, 120, 300, 600, 1800, 3600 seconds Remote vibration sensor with magnetic adapter on 39"(1m) cable Wide frequency range of 10Hz to 1Khz Data hold, AUTO power off