This is the Expanded Scale Voltmeter from Tower Hobbies. This is ONLY designed for testing NiCd and nickel-metal hydride Transmitter and Receiver Batteries. It cannot be used to test capacity or voltage in glow plug NiCds or other field batteries below 4V. FEATURES: Load tests 4.8V receiver and 9.6V transmitter NiCd and nickel-metal hydride battery packs Simulated load on transmitter side is 250mA Simulated load on receiver side is 225 - 275mA Detects under-charged battery or bad cells in a pack Green = good, Red = recharge scale with bottom numbers representing receiver batteries and top numbers representing transmitter packs Two year limited warranty, U.S. and Canada only INCLUDES: Expanded Scale Voltmeter with instruction sheet and test leads (included test leads are probe type and not specific to any battery) REQUIRES: Leads depending on brand and type of radio; HCAP0101 TX/RX charge leads NO 9VAP Futaba J HCAP0102 TX/RX charge leads 9VAP only Futaba J HCAP0105 TX/RX charge leads JR HCAP0106 TX/RX charge leads Hitec/Airtronics Z HCAP0108 Two charge leads with alligator clips Modelers can make their own connectors by purchasing Banana Plugs (HCAP0310), 16 Gauge Wire, and their Radio Connector. SPECS: Dimensions: 4 x 2.9 x 1.5" (101 x 73 x 39mm) COMMENTS: Diode protected transmitter batteries cannot be tested through the transmitter charge jack. The battery must be removed from the transmitter to get an accurate voltage reading. jxs 01/26/09 ir/jxs