This is the optional XP/Polyquest Balance Board for LiPo Batteries. FEATURES: Optional lithium balancing board for use with the Hitec 4x Multicharger (HRCP4151) Compatible with LiPo Batteries ranging from 2S to 6S (7.4V - 22.2V) having the HP/Polyquest type balancing plug INCLUDES: Balance Board and Wire Adapter for HP/Polyquest type balancing plug REQUIRES: Connecting between battery and charger lmm 9.29.10 ir/jxs