The DL379BCOMBO HVAC/R Clamp Meter with a CATIV 300V rating, dual level NCV, dual display and a 3-Year limited warranty is a very user friendly clamp meter. The detachable clamp head makes it entirely versatile and the meter for a tech to have in his, or her, tool box. And is combined with the ATTPC3 Pipe Clamp Adapter.