Extech CA250 400A AC/DC Clamp-on Adaptor + NCVExtech CA250 400A AC DC Clamp on Adaptor + NCV 400A AC DC Clamp on Adaptor + NCV AC DC Current measurements to 400A With built in non contact AC voltage detector Key Features: Fits virtually any MultiMeter with standard shrouded banana plug sockets Built in non contact voltage detector with LED alert 1. 2" (30mm) clamp jaw Measures AC DC Current in two ranges: 0 to 40A (10mV per Amp output) and 0 to 400A (1mV per Amp output) 2. 5% basic accuracy DC