Manufacturer Description

This is the Great Planes Pro Series Lithium Voltmeter LVM 2-6S.

FEATURES:
Measures and displays individual cell voltages and overall pack
    voltage of 2-6S Lithium Polymer (LiPo), Lithium Iron Phosphate
    (LiFe) and Lithium Ion (Li-Ion) batteries on an LED display
6S in-line adapter for FlightPower and Thunder Power batteries
Loop on end allows easy attachment to a wrist strap, neck strap or
    keychain

INCLUDES:
Great Planes Pro Series Lithium Voltmeter with 6S in-line adapter

REQUIRES:
Plugging in battery

SPECS:
Battery Types: LiPo, LiFe and Li-Ion
Display: LED
Voltage Range: 5.5 - 25.2V (2S - 6S)
Dimensions: 2.7 x 0.90 x 0.51" (70 x 23 x 13mm)
Weight: 0.43oz (12.3g)

BOX DIMENSIONS: 3.50" W. X .88" H. X 6.13" L.
BOX WEIGHT: .07 LBS.