BM250 True RMS practical multimeter series – perfect combination of size and innovative functions! Designed for every electrician, auto range for make job faster and more effective. High input protection and non-contact voltage detection to make measurements more safely Unique features: AutoCheck™ – automatic selection of LoZ (low imedance) DCV, LoZ ACV & Ohms (BM257) Beep-Jack™ – beeps against improper terminal plug in (decreases risk of damage) Ghost Voltage Burster – LoZ drains ghost/strain voltage leaving only hard signals on meter reading CREST 5ms – to capture instanteous peaks (BM257) EF-detection – both non-voltage (NCV) and single probe voltage detection for indentifying live lines