This is the Futaba BR-3000 Battery Checker.

FEATURES: Checks the state of the following battery packs; 2-7 cell LiFe, LiPo and Li-Ion packs with JST-XH connectors 4-7 cell NiCd and NiMH packs Battery pack total voltage display and remaining capacity are displayed on a bar graph and in percent Voltage of each cell of a lithium battery pack can also be displayed Operates on the power supplied from the connected battery One year limited warranty through Hobby Services beginning at date of purchase

INCLUDES: Futaba BR-3000 Battery Checker

SPECS: Voltage display error: ±1.5% Dimensions: 3.3 x 2.5 x 0.6" (85 x 63 x 15mm) excluding projecting parts Weight: 1.8oz (52.6g) Display range; Total voltage: (Ni type) 4.0~17V, (Li type) 5~34V Cell voltage: (Li type) 1.1~4.9V Operating temperature: -10~+45°C Storage temperature: -20~+60°C

COMMENTS: The BR-3000 Battery Checker can only be used with the battery packs listed above. It cannot handle batteries of other cell sizes and types. The checker display is based on voltage. Since the voltage changes with the individual battery and the ambient temperature, use the remaining capacity display as a criteria only. updt  

BOX DIMENSIONS: 3.88" W. X 2.13" H. X 5.63" L. BOX WEIGHT: .26 LBS.