This is a Digital Voltmeter MkIII from Hobbico.
Tests 4, 5 & 8 cell R/C batteries in a no-load or a simulated R/C load setting.

FEATURES: Custom designed LCD shows voltage in clear ½" numerals, plus
            customized characters to easily determine the meter setting and
            condition of the battery under test. The LCD not only displays
            voltage, but voltage mode, "OK" and "RECHARGE".
          Test 5 cell packs, in addition to 4- and 8-cell batteries.
          Includes a common 9V battery, located inside an easy-to-access
            compartment.
          Built-in simulated R/C load of 250mA for each setting
          Includes two input controls: a small pushbutton on the left side of
            the case, and a 3-position slide switch on the face of the meter.
          Switch load OFF and use it as a true Digital Voltmeter
          Measures DC voltage up to 19.99V, making it versatile enough for any
            DC battery - transmitter/receiver packs, starter batteries, and
            glow starter batteries.
          A 10 minute auto-timer shuts the unit OFF automatically if left ON
            by accident, to help prevent unwanted battery drain.
          Rubber grip for no-slip handling
          Color coded banana jacks, compatible with most common test leads
          One year limited warranty

INCLUDES: One Digital Voltmeter MkIII with pre-installed 9V battery
          One Instruction Sheet

REQUIRES: Test or charge leads with banana plugs such as the Hobbico
            pre-assembled test and charge leads (HCAP0101 HCAP0110)
            HCAP0101  FUTABA J Tx/Rx CHARGE LEADS (NOT FOR 9VAP)
            HCAP0102  FUTABA J Tx/Rx CHARGE LEADS 9VAP ONLY
            HCAP0105  JR Tx/Rx CHARGE LEADS
            HCAP0106  HITEC/AIRTRONICS Z Tx/Rx CHARGE LEADS
            HCAP0107  CHARGE LEAD GLOW-STARTER - ALL
            HCAP0108  CHARGE LEAD W/ ALLIGATOR CLIP(2)
            HCAP0109  VOLTMETER TEST PROBES (2)
            HCAP0110  CHARGE LEADS 9V Tx PLUG and FUT J Rx

COMMENTS: The modeler may purchase the preceding pre-made Rx and Tx connectors:
  _          However, you CANNOT test diode-protected Tx packs with voltmeters
             through the radio charge jack. The pack MUST BE REMOVED from the
             transmitter to get an accurate voltage reading.
          Modelers can make their own connectors by purchasing one HCAP0310
            Banana Plugs, 16 Gauge Wire, and their radio connector

SPECS:    Supply voltage: 9V DC
          Input test settings under load: 4.8V DC (4 cell battery)
                                            6V DC (5 cell battery)
                                          9.6V DC (8 cell battery)
          Optional load current: 250mA each setting
          Maximum voltage measurement: 19.99V DC
          Length: 4.5" (113mm)
          Width: 2¾"   (67mm)
          Height: 1" (25.4mm)
          Weight: 4.7oz (136g)
          Auto-off timer: Shuts OFF after 10 minutes
          Low battery indicator: Battery symbol in LCD window
                                                                    JAL 5/30/01
                                                                          ir/jl
                                                               updt jxs 3/13/03