This is a optional Dry-Cell (alkaline) Battery Holder for the Futaba 3PK transmitter. FEATURES: Plastic construction with metal terminals INCLUDES: One plastic battery holder with pre-installed J-plug on a 2" long lead REQUIRES: Installation into the radio and 8 AA dry-cell batteries SPECS: Length: 4.63" (117mm) Width: 2.37" (60mm) Height: .58" (15mm) kpm11/13/2003 ir/jxs