This is the 5-Cell 6V Hump Receiver pack for the HPI Baja 5B. Constructed of 5 sub-C sized cells for the large 1/5 buggy. FEATURES: Rechargeable 6V 2000mAh NiCd Black shrink wrapping Tamiya and Futaba J style connectors INCLUDES: One rechargeable 6V 2000mAh RX hump pack REQUIRES: Charging before use, can use the HPI Overnight Charger HPIP9058 SPECS: Length: 2.6" (66.35mm) Width: 1.7" (43mm) Height: 1.6" (40mm)