The Coil Master Ohm meter is a crucial tool for measuring resistance and voltage of vaping atomizers and other hardware. A Must Have for any Vaper! Parameter of product: Tested resistance:0.01Ohm-9.99Ohm Tested voltage:0.01V-9.99V Operating voltage:2.2V-5.5V Test items:test atomizers resistance and batteries voltage Working current:Less than 10mAh with no tested object Less than 30mAh with tested object Standby power consumption:Less than 10uA Color:Black Weight:50g Package:nice black box Standard Configuration: 1*Meter Device 2*Connector How to use: There are two ports on the Digital Ohmmeter&Voltmeter.The one nearby the LED display is for testing voltage and another one is for testing resistance. (The ports are for eGo-threaded devices and the connector for 510-threaded devices.)