uniquegoods Resistance Tester OHM meter for E Cigarette 510 808D Thread RDA RBA DIY vaporizer CE atomizer voltage tester for EGO battery Testing range: 0- 20 ohm resistance testing range and 0-12V Voltage testing range . It designed for voltage and ohm readings. Bright display screen with red numbers on it. 3 in 1 thread;Fit for EGO 510, 808D, M7, M8 thread. It is quite convenient for you to bring anywhere. Portable and small are its core features.