I have the Lava tube and love the battery life and being able to read the ohms on the units used. Also the voltage is nice to play with nice range for all my tanks 3v to 6V. Now the version 2.5 has the ability to play with watts need to figure this out now lol..for the price on the ver.2.0 think it was like 39.99 you cannot beat it ..look for the gold color 2.0 ...