Bidirectional current sensing Built-in Bluetooth for iPhone and Android smartphones to monitor and download the data Build in USB port for connecting PC; Constantly display the Current, Voltage, Power; Real-time monitoring of charging parameters; MANSON | DPM-3332 Digital DC power meter with Internal Shunt measures: 0-30A (0.01A), 5-60V (0.01V). Features | - | - Bidirectional current sensing; | - Build in USB port for connecting PC; | - Constantly display the Current, Voltage, Power; | - Scrolling to display Max V, Max I, Min. V, Min. I, Watt Hour, Amp Hour, and total operation time in hours, minutes, and seconds; | - Any one of_the scrolling_displays can be selected for continuous display; | - Built-in Bluetooth for iPhone and Android smartphones to monitor and download the data; | - Real-time monitoring of charging parameters; | - Easy download of stored data; | - Adjustable logging_intervals_range from 30 seconds to 180 seconds; | - 3,600 sets of V& I with time and_the last_set of scrolled displays are stored; | - 180 hours of recorded time when logging interval set to 180 sec; | - Data stored in the meter can be downloaded to_a PC_through_a USB_connection; | - Wireless data monitor and download; | - The unit_can be mounted on a supplied snap-on bracket or magnetically on_an iron_surface;Bidirectional measurement | DPM can measure the current in both directions or just one direction. | In typical applications using a battery bank as a base reference, the DPM data logs the discharging current (negative current) & discharging Ah or the charging current (positive current) & charging Ah. | This unique capability brings in related both the negative and the positive ampere hour, peak current & etc. values. | The support of bidirectional current measurement reduces the complication of wiring and several meters when in-and-out current measurement is needed.Built-in Bluetooth for monitoring & download by smartphones | Each standard the DPM-3332 is capable of real-time monitoring of charging parameters and data download by using smartphones with installed Apps. | Large internal data storage |