⚡ 【 High Accuracy Professional & Multifunctional DMM】 The electric multi-tester HP-770HC-APP with 6000 counts can use DC voltage 0.01 mV ~ 1000 V, AC voltage (True RMS) 0.01 mV ~ 750 V, AC/DC 600 μA ~ 600 A,resistance 600 Ω ~ 60 MΩ , Accurately measure capacitance 6nF ~ 60mF, frequency 9.999Hz ~ 9.999MHz, duty cycle 0.1% ~ 99.9%, transistor hFE test 0-1000 (Ib = 10μA, Vce = 1.8V), temperature -4°F ~ 1000 832 ° F. ⚡ 【 Wireless connection phone app multimeter】 press and hold the REL ▲ button for more than two seconds in each gear, the symbol "RS232" appears, can be connected to the mobile phone via Bluetooth. You can scan the QR code of the manual. Or browse the app store, download and install the app. The distance of remote monitoring and measurement is 10-15 m. Data storage has.