This is the Astro Flight"Blinky" LiPo Battery Balancer for one to six cell LiPo batteries FEATURES: This battery balancer is designed for use with LiPo batteries Accepts one to six cell LiPo batteries Now you can see if all cells are above 3.2V before charging You can discharge individual cells that are over charged Connector has .100mm in pin spacing and .025mm sqaure pins and fits Apogee and other brands INCLUDES: One Astro Flight Blinky LiPo Battery Balancer One instruction sheet SPECS: Length: 2.45" (62.43mm) Width: 1.44" (36.62mm) Height: .25" (6.4mm) COMMENTS: For questions regarding this item one would need to contact Astro Flight directly.