Testo 760-2 Digital Multimeter – Multimeter T-RMS for HVAC measurements, current, and frequency testing – voltage tester including automatic range detection, auto power off, and thermocouple adapter: Amazon.com: Tools & Home Improvement
testo 770-3 True-rms Clamp Meter with Bluetooth - Advanced Tools
Testo 760-2 True Root Mean Square Measurement Digital Multimeter