This is the 4-Cell Dry receiver battery box with Futaba J connector. / / FEATURES: Designed to be used with 4 AA alkaline batteries. / Made of black plastic. / Futaba J style connector. / One year Warranty / / INCLUDES: One Black plastic 4-AA size dry-cell battery box with Futaba J / connector. / / SPECS: Length: 2.29" (58mm) / Width: 1.22" (31mm) / Height: 1.22" (31mm) / / / ir/kh